{"product_id":"mcs908440","title":"Hastings 3-7\/16\" Bore Chr\/Moly Piston Ring Set. STD – 41-E78 1200cc\/74\" Big Twin","description":"\u003ch2\u003eHastings 3-7\/16\" Bore Chr\/Moly Piston Ring Set. STD – 41-E78 1200cc\/74\" Big Twin\u003c\/h2\u003e\n\u003cp\u003eStd cyl. bore: 3.4375\" (87.312mm). 1st ring: 1.6mm. 2nd ring: 1.6mm. oil ring: 4.75mm. Tech tip: Piston grooves vs piston rings. It''s not difficult to determine if a Hastings piston ring set will fit a certain piston. You should measure the height of the piston groove in the piston itself. The 2 top grooves will be for compression rings; the lower groove will be for the oil ring. In most cases Hastings oil rings are of the low tension 3-piece flex vent type. Ring heights are listed for reference. Tech tip: Piston oversizes. For each oversize cylinder diameter will increase with .010\" (0.254mm). The standard bore of the cylinder is listed for reference. (Tech tip information provided by Hastings Manufacturing Company; Inc.)\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e41-E78 1200cc\/74\" Big Twin (Excl. Flatheads) (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Hastings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTON RINGS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e PR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 908440\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hastings","offers":[{"title":"Default Title","offer_id":57378309439875,"sku":"MCS908440","price":36.39,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/908440k_c4e8104b-d62f-4b89-86f1-93f1995dbf1b.jpg?v=1775576939","url":"https:\/\/hogparts.com\/products\/mcs908440","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}