{"title":"KB-Performance Piston","description":null,"products":[{"product_id":"mcs944730","title":"KB Performance Piston Keith Black, Replacement Piston Pin .792\" – All KB Pistons","description":"\u003ch2\u003eKB Performance Piston Keith Black, Replacement Piston Pin .792\" – All KB Pistons\u003c\/h2\u003e\n\u003cp\u003eStandard replacement wrist pin for KB pistons. Note: See 944731 for matching KB wrist pin lock ring.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eAll KB pistons (excl. all Twin Cam; KB344; KB343 and KB399 series pistons)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; WRISTPINS AND BUSHINGS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944730\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57362356732291,"sku":"MCS944730","price":6.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944730k.jpg?v=1775471860"},{"product_id":"mcs574103","title":"KB Performance Piston M8 114\/117 to 120\" Big Bore Conv. Piston Set. STD – 2017–2024 114\" M8","description":"\u003ch2\u003eKB Performance Piston M8 114\/117 to 120\" Big Bore Conv. Piston Set. STD – 2017–2024 114\" M8\u003c\/h2\u003e\n\u003cp\u003eForged Super Duty series for the Milwaukee Eight engine. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ''micro-welding''. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation; final tolerance will be 0.003\". The piston creates its own perfect tolerance during run-in; the coating automatically gives the tightest possible \u0026amp; perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 114\/117\" M8 engines; cylinder must be bored to 4.125\" big bore size. Case boring is not required; OEM weight so rebalancing is not required and works with stock 4.500\" stroke. 10.9:1 CR. (with 88.6cc head volume). Piston weight: OEM. Piston pin weight 115gr.; offset: 0.025\". Piston: +1.9cc\/Flat top. Compression height: 1.083\". Ring pack: 1.2mm 1.2mm 3.0mm. Bore 4 1\/8\" \/ Stroke stock 4.500\".\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e17-24 114\" M8 (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTON KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 574103\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57370228523395,"sku":"MCS574103","price":422.83,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/574103k_0cef9a23-76be-4383-b444-c55a833939ef.jpg?v=1775144882"},{"product_id":"mcs944614","title":"KB Performance Piston 883-1200 Big Bore Piston Kit. +.005\" – 1986–2022 XL883 (883 to 1200 Conversion)","description":"\u003ch2\u003eKB Performance Piston 883-1200 Big Bore Piston Kit. +.005\" – 1986–2022 XL883 (883 to 1200 Conversion)\u003c\/h2\u003e\n\u003cp\u003eHigh compression. 883-1200 conversion piston set. Compatible with stock unmodified cylinder heads. 10:1 Compression ratio. Piston weight 335gr. Piston pin diameter .792\" and weight 97gr. Head type: Dish. Dome +10cc. Compression height 1.210\". Bore 3.498\". Stroke 3.812\". Rod length 6.926\". Cyl. length 4.650\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions. Note: 1200cc cylinders must be purchased for 04-up 883 XL models. Stock cylinders liners of 04-up XL models are too thin to bore to 1200 size.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e86-22 XL883 (883 to 1200 conversion)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944614\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378681651587,"sku":"MCS944614","price":246.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944614k_ff003373-c12d-47d8-8497-35170663d3ed.jpg?v=1775575595"},{"product_id":"mcs944620","title":"KB Performance Piston 1200 XL Piston Kit. +.005\" – 1988–2022 XL1200","description":"\u003ch2\u003eKB Performance Piston 1200 XL Piston Kit. +.005\" – 1988–2022 XL1200\u003c\/h2\u003e\n\u003cp\u003eStandard replacement piston set for stock applications. Stock 9.0:1 compression ratio. Piston weight 341gr. Piston pin weight 97gr. Head type: Flat top \/ Dome +1.5cc. Compression height 1.210\". Bore 3.498\" \/ Stroke 3.812\". Rod length 6.938\" \/ Cyl. length 4.650\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e88-22 XL1200 (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944620\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378684666243,"sku":"MCS944620","price":227.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944620k_b2492ebe-d09b-4424-8061-580e98bbfd00.jpg?v=1775575588"},{"product_id":"mcs944625","title":"KB Performance Piston 1200 XL Piston Kit. STD – 1988–2022 XL1200","description":"\u003ch2\u003eKB Performance Piston 1200 XL Piston Kit. STD – 1988–2022 XL1200\u003c\/h2\u003e\n\u003cp\u003eStandard replacement piston set; for stock or high lift camshafts. With a lowered top ring and deeper valve pockets to accomodate the higher lift cams. Stock 9.0:1 compression ratio. Piston weight 341gr. Piston pin weight 97gr. Head type: Flat top \/ Dome +1.5cc. Compression height 1.210\". Bore 3.498\" \/ Stroke 3.812\". Rod length 6.938\" \/ Cyl. length 4.650\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e88-22 XL1200 (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944625\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378685190531,"sku":"MCS944625","price":227.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944625k_9b910603-0248-4ec3-a7d6-36fc9e01db48.jpg?v=1775575582"},{"product_id":"mcs944632","title":"KB Performance Piston 1200cc B.T. Piston Kit. +.005\" – 1941–1978 74\"\/1200cc Knuckle; Pan…","description":"\u003ch2\u003eKB Performance Piston 1200cc B.T. Piston Kit. +.005\" – 1941–1978 74\"\/1200cc Knuckle; Pan…\u003c\/h2\u003e\n\u003cp\u003eCompatible with stock cylinders and heads; gives stock compression ratio. 8.5:1 CR. Piston weight 370gr. Piston pin weight 97gr. Head type: Dome 0.656\" \/ Dome -57cc. Compression height 1.450\". Bore 3.4375\" \/ Stroke 3.969\" (3-31\/32\"). Rod length 7.440\" \/ Cyl. length 5.330\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e41-78 74\"\/1200cc Knuckle; Pan; Shovel (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944632\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378686206339,"sku":"MCS944632","price":240.13,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944632k_426d57c1-65a9-4cd7-8284-2c360da713e4.jpg?v=1775575577"},{"product_id":"mcs944647","title":"KB Performance Piston 1340cc Shovel Piston Kit. STD – 1979–1984 1340cc Shovel","description":"\u003ch2\u003eKB Performance Piston 1340cc Shovel Piston Kit. STD – 1979–1984 1340cc Shovel\u003c\/h2\u003e\n\u003cp\u003e8.0:1 CR. Piston weight 357gr. Piston pin weight 97gr. Head type: Dome 0.426\" \/ Dome -30cc. Compression height 1.285\". \/ Bore 3.4980\". Stroke 4.250\" (4-1\/4\"). Rod length 7.440\" \/ Cyl. length 5.330\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions. Note: Around 30% of stock 1340cc Shovel cylinders may present a problem in combination with the location of some of the oil return holes since KB pistons have a wider piston ring pack for better piston stability in the cylinder. In these cases the oil return hole must be re-located (lowered) to avoid excessive oil consumption.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e79-84 1340cc Shovel (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944647\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378689548675,"sku":"MCS944647","price":246.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944647k_a539541b-aaa2-4c62-8dc7-0440c6e73898.jpg?v=1775575569"},{"product_id":"mcs944654","title":"KB Performance Piston 1340cc Shovel Pop-up Piston Kit. +.005\" – 1979–1984 1340cc Shovel","description":"\u003ch2\u003eKB Performance Piston 1340cc Shovel Pop-up Piston Kit. +.005\" – 1979–1984 1340cc Shovel\u003c\/h2\u003e\n\u003cp\u003eHigh compression pop-up piston set. 9.5:1 CR. Piston weight 388gr. Piston pin weight 97gr. Head type: Dome \/ Dome -47cc. Compression height 1.285\" \/ Bore 3.4980\". Stroke 4.250\". Rod length 7.440\" \/ Cyl. length 5.330\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions. Note: Around 30% of stock 1340cc Shovel cylinders may present a problem in combination with the location of some of the oil return holes since KB pistons have a wider piston ring pack for better piston stability in the cylinder. In these cases the oil return hole must be re-located (lowered) to avoid excessive oil consumption.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e79-84 1340cc Shovel (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944654\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378690957699,"sku":"MCS944654","price":246.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944654k_e7a08937-d666-4127-b913-e04030cbd3fb.jpg?v=1775575565"},{"product_id":"mcs944659","title":"KB Performance Piston 1340cc Evo B.T. Piston Kit. STD – 1984–1999 Evo Big Twin","description":"\u003ch2\u003eKB Performance Piston 1340cc Evo B.T. Piston Kit. STD – 1984–1999 Evo Big Twin\u003c\/h2\u003e\n\u003cp\u003e8.5:1 CR. Piston weight 350gr. Piston pin weight 97gr. Head type: Flat top. Dome +1.5cc. Compression height 1.375\". Bore 3.4980\". Stroke 4.250\" (4-1\/4\"). Rod length 7.440\". Cyl. length 5.550\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e84-99 Evo Big Twin (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944659\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378691645827,"sku":"MCS944659","price":233.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944659k_8def67a6-a6ee-4278-961e-9aba687fdc61.jpg?v=1775575562"},{"product_id":"mcs944660","title":"KB Performance Piston 1340cc Evo B.T. Piston Kit. +.005\" – 1984–1999 Evo Big Twin","description":"\u003ch2\u003eKB Performance Piston 1340cc Evo B.T. Piston Kit. +.005\" – 1984–1999 Evo Big Twin\u003c\/h2\u003e\n\u003cp\u003e8.5:1 CR. Piston weight 350gr. Piston pin weight 97gr. Head type: Flat top. Dome +1.5cc. Compression height 1.375\". Bore 3.4980\". Stroke 4.250\" (4-1\/4\"). Rod length 7.440\". Cyl. length 5.550\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e84-99 Evo Big Twin (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944660\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378691842435,"sku":"MCS944660","price":233.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944660k_d892384a-3963-4529-8548-a358938f22a9.jpg?v=1775575561"},{"product_id":"mcs944665","title":"KB Performance Piston 1340cc Evo B.T. Pop-up Piston Kit. STD – 1984–1999 Evo Big Twin","description":"\u003ch2\u003eKB Performance Piston 1340cc Evo B.T. Pop-up Piston Kit. STD – 1984–1999 Evo Big Twin\u003c\/h2\u003e\n\u003cp\u003ePop-up high compression. 9.5:1 CR. Piston weight 392gr. Piston pin weight 97gr. Head type: Dome. Dome -9cc. Compression height 1.375\". Bore 3.4980\". Stroke 4.250\" (4 1\/4\"). Rod length 7.440\". Cyl. length 5.550\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e84-99 Evo Big Twin (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944665\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378692628867,"sku":"MCS944665","price":246.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944665k_39c6b8ac-6b6d-40b0-b417-664f91ac57bc.jpg?v=1775575558"},{"product_id":"mcs944672","title":"KB Performance Piston 1340cc Evo B.T. Pop-up Piston Kit. +.005\" – 1984–1999 Evo Big Twin","description":"\u003ch2\u003eKB Performance Piston 1340cc Evo B.T. Pop-up Piston Kit. +.005\" – 1984–1999 Evo Big Twin\u003c\/h2\u003e\n\u003cp\u003ePop-up high compression. 10.5:1 CR. Piston weight 360gr. Piston pin weight 97gr. Head type: Dome 0.200\". Dome -18cc. Compression height 1.375\". Bore 3.4980\". Stroke 4.250\" (4-1\/4\"). Rod length 7.440\". Cyl. length 5.550\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e84-99 Evo Big Twin (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944672\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378693415299,"sku":"MCS944672","price":246.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944672k_c78c5baa-37c5-49c4-be42-96e5d3c3cd7c.jpg?v=1775575554"},{"product_id":"mcs944685","title":"KB Performance Piston 3-5\/8\" Big Bore Piston Kit. +.010\" – 1948–1984 Big Twin with 3-5\/8 Big Bore…","description":"\u003ch2\u003eKB Performance Piston 3-5\/8\" Big Bore Piston Kit. +.010\" – 1948–1984 Big Twin with 3-5\/8 Big Bore…\u003c\/h2\u003e\n\u003cp\u003e3-5\/8\" big bore piston set. Used with 3 5\/8\" big bore cylinders with 5.330\" (stock) to 5.530\" (+.200\") length. Use with 4-1\/4\" stock stroke (88\"); 4-1\/2\" (93\"); 4-5\/8\" (96\") to 4-3\/4\" (98\") stroker flywheels. 10.0:1 CR. Piston weight 385gr. Piston pin weight 97gr. Head type: Dome \/ Dome -57cc. Compression height 1.285\" \/ Bore 3.625\" (3 5\/8\"). Stroke 4.250\" to 4.750\" (4-1\/4\" to 4-3\/4\"). Rod length 7.440\" \/ Cyl. length 5.330\" (Std) to 5.530\" (+.200\"). Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions. Note: 5.330\" cylinders can be used with stock 4-1\/4\" stroke. Longer strokes require correct length longer cylinders or stroker plates to achieve the desired compression ratio. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e48-84 Big Twin with 3-5\/8 big bore cylinders and strokes from 4-1\/4\" to 4-3\/4\" (88\" to 98\" engines)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944685\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378693906819,"sku":"MCS944685","price":295.86,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944685k_9752fe0a-1cc1-4066-90d9-ab332ec5c0b6.jpg?v=1775575549"},{"product_id":"mcs944717","title":"KB Performance Piston 88\" To 95\" Big Bore Piston Set. +.010\" – 1999–2006 Twin Cam A\/B","description":"\u003ch2\u003eKB Performance Piston 88\" To 95\" Big Bore Piston Set. +.010\" – 1999–2006 Twin Cam A\/B\u003c\/h2\u003e\n\u003cp\u003e88\" to 95\" big bore conversion kit. Used with stock heads and cylinders; 3-3\/4\" bore and 4.938\" long cylinders. By boring the stock cylinders to the 3-7\/8\" big bore size you will increase engine capacity from 88\" (1448cc) to 95\" (1546cc). 9.25:1 CR. Piston weight 400gr. Piston pin weight 97gr. \/ Head type: Flat top. Dome +16.7cc \/ Compression height 1.270\". Bore 3.875\" (3-7\/8\") \/ Stroke 4.000\". Rod length 7.667\" \/ Cyl. length 4.938\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e99-06 Twin Cam A\/B (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944717\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378694529411,"sku":"MCS944717","price":295.83,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944717k_c1499838-b16f-4590-b527-1a683b91edec.jpg?v=1775575542"},{"product_id":"mcs944731","title":"KB Performance Piston Keith Black, Replacement .792\" Piston Lock Ring – All .792\" KB Pistons","description":"\u003ch2\u003eKB Performance Piston Keith Black, Replacement .792\" Piston Lock Ring – All .792\" KB Pistons\u003c\/h2\u003e\n\u003cp\u003eFits all KB .792\" piston pins. 2 used on 1 piston. Note: See 944730 for matching KB .792\" piston pin \/ wrist pin.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eAll .792\" KB pistons\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS REPL PARTS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e 4P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944731\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378694824323,"sku":"MCS944731","price":5.69,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944731k_5e1529a3-9d36-4abb-8f3f-ae11a5d1c4ac.jpg?v=1775575539"},{"product_id":"mcs944735","title":"KB Performance Piston XL883 Piston Kit. STD – 1986–2022 XL883","description":"\u003ch2\u003eKB Performance Piston XL883 Piston Kit. STD – 1986–2022 XL883\u003c\/h2\u003e\n\u003cp\u003eStandard replacement piston set. Stock 9.0:1 compression ratio. Piston weight 253gr. Piston pin weight 77gr. Head type: Flat top \/ Dome +1.2cc. Compression height 1.210\". Bore 3.00\" \/ Stroke 3.812\". Rod length 6.926\" \/ Cyl. length 4.650\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e86-22 XL883 (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944735\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378695184771,"sku":"MCS944735","price":219.2,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944735k_b2ff3104-d492-4e99-84b2-6644f02e1341.jpg?v=1775575538"},{"product_id":"mcs944741","title":"KB Performance Piston 88\" To 95\" Big Bore Piston Set. Std – 1999–2006 Twin Cam","description":"\u003ch2\u003eKB Performance Piston 88\" To 95\" Big Bore Piston Set. Std – 1999–2006 Twin Cam\u003c\/h2\u003e\n\u003cp\u003e88\" to 95\" big bore conversion. Used with stock heads and cylinders. By boring the stock cylinders from 3-3\/4\" to 3-7\/8\" big bore size engine capacity will increase from 88\" to 95\". High compression (pop-up). 10.5:1 CR. Piston weight 437gr. Piston pin weight 97gr. \/ Head type: Dome. Dome -11.2cc \/ Compression height 1.270\". Bore 3.875\" \/ Stroke 4.000\". Rod length 7.667\" \/ Cylinder length 4.938\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e99-06 Twin Cam (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944741\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378695840131,"sku":"MCS944741","price":308.12,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944741k_c5cb674c-83a8-4552-9bb8-459954059765.jpg?v=1775575535"},{"product_id":"mcs944750","title":"KB Performance Piston 883-1200 Big Bore Piston Kit. STD – 1986–2022 XL883 (883 to 1200 Conversion)","description":"\u003ch2\u003eKB Performance Piston 883-1200 Big Bore Piston Kit. STD – 1986–2022 XL883 (883 to 1200 Conversion)\u003c\/h2\u003e\n\u003cp\u003eSTD compression. 883-1200 conversion piston set. Compatible with stock unmodified cylinder heads. 9:1 stock compression ratio. Pistons are flat top; .125\" below deck height; to achieve a 9:1 CR with a compression height of 1.090\". Piston weight 310gr. Piston pin diameter .792\" and weight 97gr. Head type: Flat top \/ Dome +0.5cc. Compression height 1.090\". Bore 3.498\" \/ Stroke 3.812\". Rod length 6.926\" \/ Cyl. length 4.650\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions. Note: 1200cc cylinders must be purchased for 04-up 883 XL models. Stock cylinders liners of 04-up XL models are too thin to bore to 1200 size.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e86-22 XL883 (883 to 1200 conversion)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944750\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378697052547,"sku":"MCS944750","price":246.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944750k_9fc9c447-fe77-4e69-b52f-5047ef4a3a45.jpg?v=1775575531"},{"product_id":"mcs944756","title":"KB Performance Piston 96\" To 103\" Big Bore Piston Set. Std – 2007–2017 Twin Cam","description":"\u003ch2\u003eKB Performance Piston 96\" To 103\" Big Bore Piston Set. Std – 2007–2017 Twin Cam\u003c\/h2\u003e\n\u003cp\u003eFor 96\" to 103\" (3 3\/4\" to 3 7\/8\") big bore conversions. Used with stock heads and cylinders. By boring the stock cylinders from 3-3\/4\" to 3-7\/8\" big bore size engine capacity will increase from 96\" to 103\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. 10.0:1 CR with 85cc head. Head type: Flat top. +1.9cc \/ Compression height 1.076\". Bore 3.875\" \/ Stroke 4.375\". Rod length 7.667\". Note: Top compression ring will need additional clearance. See instructions.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e07-17 Twin Cam (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944756\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378697773443,"sku":"MCS944756","price":225.59,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944756k_0861e960-986c-4c8d-a73d-922e0517e4d0.jpg?v=1775575528"},{"product_id":"mcs944762","title":"KB Performance Piston XR1200\/Buell XB Piston Kit. STD – 2008–2012 XR1200; 2008–2010 Buell 1200…","description":"\u003ch2\u003eKB Performance Piston XR1200\/Buell XB Piston Kit. STD – 2008–2012 XR1200; 2008–2010 Buell 1200…\u003c\/h2\u003e\n\u003cp\u003eForged aluminum piston set for stock stroke and cylinders. 9.2:1 CR with 69cc; 10.1:1 CR with 62cc; 11:1 CR with 55cc and 11.6:1 CR with 51cc cylinder heads. Piston weight 360 gr. \/ Piston pin 97gr. Head type: Domed with -1cc. Compression height 1.210\". Bore 3.498\" \/ Stroke 3.812\" \/ Rod length 6.926\". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: All KB forged pistons come equipped with offset wrist pins \/ piston pins. There is a front and rear section on the piston and it is necessary to install it in the correct way. Please refer to the installation instructions; as provided with each piston set; prior to installation.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e08-12 XR1200; 08-10 Buell 1200 XB (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944762\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378702033283,"sku":"MCS944762","price":227.4,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944762k_80c82a9c-c79c-423f-bae1-ef2f2948c24b.jpg?v=1775575525"},{"product_id":"mcs944774","title":"KB Performance Piston 1340 Evo B.T. Forged Piston Kit. STD – 1984–1999 Evo Big Twin","description":"\u003ch2\u003eKB Performance Piston 1340 Evo B.T. Forged Piston Kit. STD – 1984–1999 Evo Big Twin\u003c\/h2\u003e\n\u003cp\u003eForged piston set. 9.5:1 CR with 80cc head. Piston weight 365gr. Piston pin weight 97gr. Piston pin dia. .792\" \/ offset. Head type: Dome with -8.5cc. Compression height 1.375\". Bore 3.4980\". Stroke 4.250\". Rod length 7.440\". Cyl. length 5.550\". All KB forged pistons are made from 4032 alloy; a 11% silicon alloy that is formed in a forging press. Forging aluminum gives a superior strength and structural integrity on a molecular level; after which it is fully machined. The combination of this alloy and the forging process allows the piston to flex under detonation; or pre-ignition; giving the best resistance to cracking. Although 4032 has a low expansion rate; it is higher than the cast Hypereutectic. Therefore forged KB pistons will require about .001\" wider piston to wall clearance. Pistons are sold as sets; complete with wrist pin retaining rings; wrist pins and piston rings. Note; All KB forged pistons come equipped with offset wrist pins \/ piston pins. There is a front and rear section on the piston and it is necessary to install it in the correct way. Please refer to the installation instructions; as provided with the piston set; prior to installation.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e84-99 Evo Big Twin (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944774\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378702983555,"sku":"MCS944774","price":300.31,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944774k_dfed8023-f0d3-41de-8be5-ab5ffd0f38c9.jpg?v=1775575521"},{"product_id":"mcs944780","title":"KB Performance Piston Piston Set Std – 1986–2022 XL883 (883 to 1200 Conversion)","description":"\u003ch2\u003eKB Performance Piston Piston Set Std – 1986–2022 XL883 (883 to 1200 Conversion)\u003c\/h2\u003e\n\u003cp\u003e883-1200 conversion forged piston set. 10.1 CR with 51cc head. Works with unmodified 883 heads. Piston weight 337gr. Piston pin weight 97gr. Piston pin dia. .791\" \/ offset. Head type: Dish with +9.8cc. Compression height 1.280\". Bore 3.498\". Stroke 3.812\". Rod length 6.926\". Cyl. length 4.650\". All KB forged pistons are made from 4032 alloy; a 11% silicon alloy that is formed in a forging press. Forging aluminum gives a superior strength and structural integrity on a molecular level; after which it is fully machined. The combination of this alloy and the forging process allows the piston to flex under detonation; or pre-ignition; giving the best resistance to cracking. Although 4032 has a low expansion rate; it is higher than the cast Hypereutectic. Therefore forged KB pistons will require about .001\" wider piston to wall clearance. Pistons are sold as sets; complete with wrist pin retaining rings; wrist pins and piston rings. Please note that all KB forged pistons come equipped with offset wrist pins \/ piston pins. There is a front and rear section on the piston and it is necessary to install it in the correct way. Please refer to the installation instructions; as provided with each piston set; prior to installation. Note: For 04-up XL models 1200cc cylinders must be used. The stock 04-up 883 cylinder liners are too thin for boring to 1200 size.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e86-22 XL883 (883 to 1200 conversion) (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944780\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378703966595,"sku":"MCS944780","price":300.31,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944780k_0664bcfe-5e34-4e65-8865-a227bf1b5cc4.jpg?v=1775575518"},{"product_id":"mcs944786","title":"KB Performance Piston 1200cc B.T. Forged Piston Kit. STD – 1941–1978 1200cc\/80\" Knuckle; Pan…","description":"\u003ch2\u003eKB Performance Piston 1200cc B.T. Forged Piston Kit. STD – 1941–1978 1200cc\/80\" Knuckle; Pan…\u003c\/h2\u003e\n\u003cp\u003eForged piston set. 8.5:1 CR with 112cc head. Standard replacement. Piston weight 456gr. Piston pin weight 97gr. Piston pin dia. .791\" \/ offset. Head type: Dome with -47.6cc. Compression height 1.450\". Bore 3.437\". Stroke 3.969\". Rod length 7.440\". Cyl. length 5.330\". All KB forged pistons are made from 4032 alloy; a 11% silicon alloy that is formed in a forging press. Forging aluminum gives a superior strength and structural integrity on a molecular level; after which it is fully machined. The combination of this alloy and the forging process allows the piston to flex under detonation; or pre-ignition; giving the best resistance to cracking. Although 4032 has a low expansion rate; it is higher than the cast Hypereutectic. Therefore forged KB pistons will require about .001\" wider piston to wall clearance. Pistons are sold as sets; complete with wrist pin retaining rings; wrist pins and piston rings. Please note that all KB forged pistons come equipped with offset wrist pins \/ piston pins. There is a front and rear section on the piston and it is necessary to install it in the correct way. Please refer to the installation instructions; as provided with each piston set; prior to installation.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e41-78 1200cc\/80\" Knuckle; Pan; Shovel (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944786\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378704621955,"sku":"MCS944786","price":266.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944786k_dddfe9dc-343a-4031-8a26-c0e3c1e46d2e.jpg?v=1775575514"},{"product_id":"mcs944796","title":"KB Performance Piston 1340 Shovel Forged Piston Kit. STD – 1979–1984 1340cc Shovel","description":"\u003ch2\u003eKB Performance Piston 1340 Shovel Forged Piston Kit. STD – 1979–1984 1340cc Shovel\u003c\/h2\u003e\n\u003cp\u003eForged piston set. 9.0:1 CR with 112cc head. Piston weight 416gr. Piston pin weight 97gr. Piston pin dia. .791\" \/ offset. Head type: Dome with -52.7cc. Compression height 1.285\". Bore 3.498\". Stroke 4.250\". Rod length 7.440\". Cyl. length 5.330\". All KB forged pistons are made from 4032 alloy; a 11% silicon alloy that is formed in a forging press. Forging aluminum gives a superior strength and structural integrity on a molecular level; after which it is fully machined. The combination of this alloy and the forging process allows the piston to flex under detonation; or pre-ignition; giving the best resistance to cracking. Although 4032 has a low expansion rate; it is higher than the cast Hypereutectic. Therefore forged KB pistons will require about .001\" wider piston to wall clearance. Pistons are sold as sets; complete with wrist pin retaining rings; wrist pins and piston rings. Note: All KB forged pistons come equipped with offset wrist pins \/ piston pins. There is a front and rear section on the piston and it is necessary to install it in the correct way. Please refer to the installation instructions; as provided with the piston set; prior to installation.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e79-84 1340cc Shovel (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944796\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378705736067,"sku":"MCS944796","price":266.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944796k_78e37a34-10b0-4407-bd87-8b5d4cc320f4.jpg?v=1775575508"},{"product_id":"mcs944802","title":"KB Performance Piston 3-5\/8 Big Bore Forged Piston Kit. STD – 1948–1984 Pan; Shovel. With 3-5\/8 Big…","description":"\u003ch2\u003eKB Performance Piston 3-5\/8 Big Bore Forged Piston Kit. STD – 1948–1984 Pan; Shovel. With 3-5\/8 Big…\u003c\/h2\u003e\n\u003cp\u003eForged 3-5\/8 big bore piston set. Used with 3-5\/8\" big bore cylinders with 5.330\" (stock) to 5.530\" (+.200\") length. Must use 4-1\/4\" (stock) (88\"); 4-1\/2\" (93''\"); 4-5\/8\" (96\") to 4-3\/4\" (98\") stroker flywheels. 8.50:1 CR with 117cc head; 4.250\" stroke \u0026amp; Std. cyl. length. 9.38:1 CR with 117cc head \u0026amp; 4.750\" stroke \u0026amp; Std. cyl. length. Piston weight 440gr. Piston pin weight 97gr. Piston pin dia. .791\" \/ offset. Head type: Dome with -42.3cc. Compression height 1.285\". Bore 3.625\". Stroke 1.250\" to 4.750\". Rod length 7.440\". Cyl. length 5.530\" Std to +.200\" higher. All KB forged pistons are made from 4032 alloy; a 11% silicon alloy that is formed in a forging press. Forging aluminum gives a superior strength and structural integrity on a molecular level; after which it is fully machined. The combination of this alloy and the forging process allows the piston to flex under detonation; or pre-ignition; giving the best resistance to cracking. Although 4032 has a low expansion rate; it is higher than the cast Hypereutectic. Therefore forged KB pistons will require about .001\" wider piston to wall clearance. Pistons are sold as sets; complete with wrist pin retaining rings; wrist pins and piston rings. Please note that all KB forged pistons come equipped with offset wrist pins \/ piston pins. There is a front and rear section on the piston and it is necessary to install it in the correct way. Please refer to the installation instructions; as provided with each pi\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e48-84 Pan; Shovel. With 3-5\/8 big bore cylinders (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944802\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378706391427,"sku":"MCS944802","price":266.08,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944802k_289b9470-c4b7-4295-951a-16514002f2c3.jpg?v=1775575504"},{"product_id":"mcs944808","title":"KB Performance Piston 88\" To 95\" Twin Cam Piston Kit. STD – 1999–2006 88\" Twin Cam","description":"\u003ch2\u003eKB Performance Piston 88\" To 95\" Twin Cam Piston Kit. STD – 1999–2006 88\" Twin Cam\u003c\/h2\u003e\n\u003cp\u003e88\" (3-3\/4\") to 95\" (3-7\/8\") big bore conversion forged piston set. 9.25:1 CR with 85cc head. Piston weight 350gr. Piston pin weight 89gr. Piston pin dia. .927\" \/ offset. Head type: Dome with -6.7cc. Compression height 1.263\". Bore 3.875\". Stroke 4.000\". Rod length 7.667\". Cyl. length 4.938\". All KB forged pistons are made from 4032 alloy; a 11% silicon alloy that is formed in a forging press. Forging aluminum gives a superior strength and structural integrity on a molecular level; after which it is fully machined. The combination of this alloy and the forging process allows the piston to flex under detonation; or pre-ignition; giving the best resistance to cracking. Although 4032 has a low expansion rate; it is higher than the cast Hypereutectic. Therefore forged KB pistons will require about .001\" wider piston to wall clearance. Pistons are sold as sets; complete with wrist pin retaining rings; wrist pins and piston rings. Note: All KB forged pistons come equipped with offset wrist pins \/ piston pins. There is a front and rear section on the piston and it is necessary to install it in the correct way. Please refer to the installation instructions; as provided with each piston set; prior to installation.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e99-06 88\" Twin Cam (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944808\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378707014019,"sku":"MCS944808","price":323.11,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944808k_cf30ba27-3547-49fa-9e15-bec9877a7891.jpg?v=1775575501"},{"product_id":"mcs944814","title":"KB Performance Piston 96\" To 103\" Twin Cam Piston Kit. STD – 2007–2017 96\" Twin Cam","description":"\u003ch2\u003eKB Performance Piston 96\" To 103\" Twin Cam Piston Kit. STD – 2007–2017 96\" Twin Cam\u003c\/h2\u003e\n\u003cp\u003eForged piston set. For 96\" (3-3\/4\") to 103\" (3-7\/8\") big bore conversion. 9.5:1 CR with stock 85cc head. Piston weight 335gr. Piston pin weight 89gr. Piston pin dia. .927\" \/ offset. Head type: Dish with +6.9cc. Compression height 1.076\". Bore 3.875\". Stroke 4.375\" (4-3\/8\"). Rod length 7.667\". Cyl. length 4.938\". Note: All KB forged pistons come equipped with offset wrist pins \/ piston pins. There is a front and rear section on the piston and it is necessary to install it in the correct way. Please refer to the installation instructions; as provided with each piston set; prior to installation.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e07-17 96\" Twin Cam (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944814\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378708226435,"sku":"MCS944814","price":323.11,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944814k_4b20615d-d29d-4b49-ae22-4b118744dda1.jpg?v=1775575497"},{"product_id":"mcs944819","title":"KB Performance Piston 96\"\/103\" To 110\" Twin Cam Piston Kit. STD – 2007–2017 110\" Twin Cam","description":"\u003ch2\u003eKB Performance Piston 96\"\/103\" To 110\" Twin Cam Piston Kit. STD – 2007–2017 110\" Twin Cam\u003c\/h2\u003e\n\u003cp\u003eForged big bore conversion piston set. Used for converting 96\" (3-3\/4\" bore) and 103\" (3-7\/8\" bore) to 110\" (4\" bore) big bore. With dished piston domes. Works with all stock cylinder heads; 96\" and 103\" with 85cc chamber and SE; MVA and CVO with 95cc chambers. 9.5:1 CR with stock 96\"\/103\" 85cc head. Piston weight 350gr. Piston pin weight 89gr. Piston pin dia. .927\" \/ offset. Head type: Dish with +13.3cc. Compression height 1.086\". Bore 4.000\". Stroke 4.375\" (4-3\/8\"). Rod length 7.667\". Cyl. length 4.938\". Note: Will not work as bolt-in with OEM H-D 4\" big bore conversion cylinders in OEM 96\" \u0026amp; 103\" crankcases. The cylinders will hit a small step in the crankcase. Also clearance between piston skirt and crankcase must be checked at bottom dead center. Cases with a large cast-in bump; just below the machined area for the cylinder sleeve; must be machined for adequate piston skirt to crankcase clearance. This is on both front \u0026amp; rear cylinder exhaust sides of the crankcase. Note: Will not fit 110\" CVO models. Note: All KB forged pistons come equipped with offset wrist pins \/ piston pins. There is a front and rear section on the piston and it is necessary to install it in the correct way. Please refer to the installation instructions; as provided with each piston set; prior to installation.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e07-17 110\" Twin Cam (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Performance Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 944819\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KB-Performance Piston","offers":[{"title":"Default Title","offer_id":57378708980099,"sku":"MCS944819","price":323.11,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/944819k_600bd2c4-6e68-449d-b90f-ee4c6e4bf122.jpg?v=1775575494"}],"url":"https:\/\/hogparts.com\/collections\/kb-performance-piston.oembed","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}