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Dyna – Engine & Gaskets

Browse engine & gaskets selected for Harley-Davidson Dyna motorcycles. Available items span engine components and gaskets, seals and service parts, helping you compare parts intended for different jobs. Confirm model coverage, key measurements and any supporting parts required on the individual listing.

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£50.39
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£46.37
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£46.37

Gardner-Westcott Rocker Box Top Bolt Kit. Allen, Chrome – 1999–2017 Twin Cam

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Gardner-Westcott Rocker Box Top Bolt Kit. Allen, Chrome – 1999–2017 Twin Cam Chrome plated allenhead (socket head) bolts. Includes washers. Fitment...

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£46.37
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£46.37
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£40.41
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£37.19
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£37.19

Gardner-Westcott Rocker Box Top Bolt Kit. Allen, Chrome – 1984–1999 Big Twin; 1986–2022 XL…

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Gardner-Westcott Rocker Box Top Bolt Kit. Allen, Chrome – 1984–1999 Big Twin; 1986–2022 XL… Chrome plated. With Allenhead (socket head) bolts. Incl...

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£37.19
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£37.19
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£15.52
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£15.52
£13.82
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£13.82

Gardner-Westcott Cyl. Base Nut Kit, Hex. Chrome – 1952–1985 K; XL Sportster & All…

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Gardner-Westcott Cyl. Base Nut Kit, Hex. Chrome – 1952–1985 K; XL Sportster & All… OEM style Fitment 52-85 K; XL Sportster (NU) & all 29-73...

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£15.52
£13.82
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£13.82
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£30.30
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£30.30
£27.89
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£27.89

Gardner-Westcott Oil Pump Mount Kit, Allen – 1992–1999 Big Twin

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Gardner-Westcott Oil Pump Mount Kit, Allen – 1992–1999 Big Twin Oil pump mount kit, allen Fitment 92-99 Big Twin (NU) (Excl. TC) Product Details ...

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£30.30
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£30.30
£27.89
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£27.89
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£19.79
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£19.79
£17.63
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£17.63

Gardner-Westcott Allen Bolt, Oil Pump Mount Kit – 1979–1991 Big Twin

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Gardner-Westcott Allen Bolt, Oil Pump Mount Kit – 1979–1991 Big Twin Allen bolt, oil pump mount kit Fitment 79-91 Big Twin (NU) Product Details B...

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£19.79
£17.63
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£17.63
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£46.28
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£46.28
£42.59
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£42.59

Gardner-Westcott Oil Pump Mount Kit, Allen Chrome – 1968–1978 FL; FX

Out of stock

Gardner-Westcott Oil Pump Mount Kit, Allen Chrome – 1968–1978 FL; FX Oil pump mount kit, allen chrome Fitment 68-78 FL; FX (NU) Product Details B...

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£46.28
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£46.28
£42.59
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£42.59
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£80.84
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£80.84
£76.96
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£76.96

Gardner-Westcott Crankcase Bolt Kit, Allen – 1979–1995 Big Twin

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Gardner-Westcott Crankcase Bolt Kit, Allen – 1979–1995 Big Twin Mounts crankcase halves together. Kits come complete with washers; studs and nuts w...

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£80.84
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£80.84
£76.96
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£76.96
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£80.43
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£80.43
£76.58
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£76.58

Gardner-Westcott Crankcase Bolt Kit, Allen – 1970–1978 Big Twin

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Gardner-Westcott Crankcase Bolt Kit, Allen – 1970–1978 Big Twin Mounts crankcase halves together. Kits come complete with washers; studs and nuts w...

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£80.43
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£76.58
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£13.44
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£11.60
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Gardner-Westcott Tappet Block Mount Kit. Allenhead, Chrome – L1976–1984 Shovelhead; 1984–1999 Evo Big…

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Gardner-Westcott Tappet Block Mount Kit. Allenhead, Chrome – L1976–1984 Shovelhead; 1984–1999 Evo Big… 1/4"-20 threaded. Replacement reference 3770...

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£13.44
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£11.60
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£105.57
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£105.57
£103.36
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£103.36

MCS Pinion Shaft, 77-E81 XL – 77-E81 XL Sportster

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MCS Pinion Shaft, 77-E81 XL – 77-E81 XL Sportster Repl. 24008-75 & 24005-75 Fitment 77-E81 XL Sportster (NU) Product Details Brand: MCS Cate...

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£105.57
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£103.36
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£72.08
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£63.71
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MCS 53-84 Tappet Block, Rear. Chrome – 1953–1965 Panhead; 1966–1984 Shovelhead

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MCS 53-84 Tappet Block, Rear. Chrome – 1953–1965 Panhead; 1966–1984 Shovelhead Replacement for L76-84 Shovel (excl. L1982 models with special route...

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£72.08
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£72.08
£63.71
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£11.81
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£10.85
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£10.85

Colony Hex Plug Oil Pump & Crankcase – 1981–1999 Big Twin

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Colony Hex Plug Oil Pump & Crankcase – 1981–1999 Big Twin Chrome. Hex head. Fits oil screen; check valve and relief valve. Fitment 81-99 Big Tw...

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£11.81
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£10.85
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£5.64
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£5.37
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MCS Rocker Arm Shim Set Shovel .007" – 1966–1984 Shovelhead

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MCS Rocker Arm Shim Set Shovel .007" – 1966–1984 Shovelhead Rocker arm shim set Shovel .007" Fitment 66-84 Shovelhead (NU) Product Details Brand:...

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£5.37
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£99.18
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£99.18
£94.43
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£94.43

Gardner-Westcott Head Bolt Kit, 12-Point – L1973–1985 XL Sportster

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Gardner-Westcott Head Bolt Kit, 12-Point – L1973–1985 XL Sportster Head bolt kit, 12-point Fitment L73-85 XL Sportster (NU) Product Details Brand...

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£99.18
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£94.43
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£44.73
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£41.17
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£41.17

Gardner-Westcott Head Bolt Kit, 12-Point – 84-E85 Evo Big Twin

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Gardner-Westcott Head Bolt Kit, 12-Point – 84-E85 Evo Big Twin No washers Fitment 84-E85 Evo Big Twin (NU) Product Details Brand: Gardner-Westcot...

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£41.17
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£41.17
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£12.72
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£12.11
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£12.11

Eastern Washer, Cylinder Head Bolt. Zinc – L1985–1990 Big Twin; 1986 XL Sportster

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Eastern Washer, Cylinder Head Bolt. Zinc – L1985–1990 Big Twin; 1986 XL Sportster 8 used. 1/2" ID x 1" OD x 5/16" high. OEM replacement reference 1...

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£12.11
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£12.72
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£12.11
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Eastern Washer, Cylinder Head Bolt. Zinc – 84-E85 Big Twin

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Eastern Washer, Cylinder Head Bolt. Zinc – 84-E85 Big Twin 8 used. 3/8 ID x 1" OD x 5/16" high. OEM replacement reference 16482-83 Fitment 84-E85 B...

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£12.72
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£12.72
£12.11
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£12.11
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£23.27
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£23.27
£19.47
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£19.47

Gardner-Westcott Head Bolt/Cyl Base Washer, Chrome – 1952–1985 XL Sportster

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Gardner-Westcott Head Bolt/Cyl Base Washer, Chrome – 1952–1985 XL Sportster 3/8" ID x 9/16" OD x 1/8" Fitment 52-85 XL Sportster Product Details ...

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£23.27
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£23.27
£19.47
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£19.47
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£41.66
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£41.66
£38.34
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£38.34

Gardner-Westcott Sportster Rocker Box Bolt Kit. Allenhead, Chrome – 1957–1976 XL Sportster

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Gardner-Westcott Sportster Rocker Box Bolt Kit. Allenhead, Chrome – 1957–1976 XL Sportster Wtih custom style allen head (socket head) bolts. Comple...

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£41.66
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£41.66
£38.34
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£38.34
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£259.08
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£228.33
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£228.33

MCS Replacement Cylinder 1000cc Sportster, Front – L1973–1985 (61") XL1000

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MCS Replacement Cylinder 1000cc Sportster, Front – L1973–1985 (61") XL1000 Black painted stock replacement cast iron cylinder. Stock 3-3/16" bore. ...

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£259.08
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£259.08
£228.33
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£110.11
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£104.84
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£104.84

Gardner-Westcott XL Side Cover Mount Kit – 1991–2003 XL Sportster

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Gardner-Westcott XL Side Cover Mount Kit – 1991–2003 XL Sportster Chrome allen Fitment 91-03 XL Sportster (NU) Product Details Brand: Gardner-Wes...

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£110.11
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£104.84
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£104.84
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S&S Cycle Piston Kit 106" Stroker
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£569.09 - £569.09
£569.09
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£569.09

S&S Cycle Piston Kit 106" Stroker #92-1210

Out of stock

DescriptionPiston Kit 106" StrokerRequired for S&S 106" stock bore stroker kit with 4-1/2" stroke flywheelsCompatible with stock or S&S Sup...

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S&S Cycle Piston Kit Big Bore 4.250" for M8 Models Forged Big Bore
£565.87 - £565.87
£565.87
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£565.87

S&S Cycle Piston Kit Big Bore 4.250" for M8 Models Forged Big Bore #920-0135

Only 4 left!

DescriptionPiston Kit Big Bore 4.250" for M8 ModelsThe Piston Kit Big Bore for M8 models is built for durability and consistent performanceThese fo...

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£565.87 - £565.87
£565.87
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£565.87
Drag Specialties Replacement Piston Kit
£85.33 - £85.33
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£85.33

Drag Specialties Replacement Piston Kit - 750769-BX-LB1

in stock

DescriptionReplacement PistonOEM quality cast aluminium alloy constructionSome fitments feature pistons with a coating that extends piston life, re...

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