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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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£37.37
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£36.84
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£36.84

Jims Nut Pinion Shaft – L1981–1988 Big Twin

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Jims Nut Pinion Shaft – L1981–1988 Big Twin 3/4-20 threaded. On flywheel side. Repl. 24016-80. Fitment L81-88 Big Twin (NU) Product Details Brand...

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£37.37
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£37.37
£36.84
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£36.84
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£57.25
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£56.44
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£56.44

Jims Pinion/Sprocket Shaft Nut – Pinion Shaft: 30-E81 Big Twin. Sprocket…

Only 3 left!

Jims Pinion/Sprocket Shaft Nut – Pinion Shaft: 30-E81 Big Twin. Sprocket… 3/4-18 threaded. Used on flywheel side. Repl. 24023-36. Fitment Pinion sh...

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£57.25
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£57.25
£56.44
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£56.44
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£75.22
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£75.22
£74.17
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£74.17

JIMS Crankpin Nut. 54-E81 XL – 54-E81 XL Sportster

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JIMS Crankpin Nut. 54-E81 XL – 54-E81 XL Sportster 1"-20 threaded. Repl. 23967-54A. Fitment 54-E81 XL Sportster (NU) Product Details Brand: Jims ...

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£75.22
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£75.22
£74.17
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£74.17
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£55.78
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£55.78
£54.99
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Jims Crankpin Nuts – 1941–1953 Big Twin

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Jims Crankpin Nuts – 1941–1953 Big Twin 7/8"-18 threaded. Repl. 23967-41 (366-41). Fitment 41-53 Big Twin (Excl. Flatheads) (NU) Product Details ...

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£55.78
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£55.78
£54.99
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£54.99
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£163.59
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£161.31
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£161.31

Jims Steel Breather Valve. +.030" – 48-E77 Big Twin

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Jims Steel Breather Valve. +.030" – 48-E77 Big Twin +.030" oversized breather is used to save worn or damaged crankcases. Manufactured from aerospa...

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£163.59
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£163.59
£161.31
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£161.31
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£118.41
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£106.83
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£106.83

Jims 53-84 Tappet. Standard .731" O.D – 1953–1965 Panhead; 1966–1984 Shovelhead

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Jims 53-84 Tappet. Standard .731" O.D – 1953–1965 Panhead; 1966–1984 Shovelhead OEM style replacement tappet lifter only; without the hydraulic uni...

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£118.41
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£118.41
£106.83
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£106.83
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£165.35
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£146.99
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£146.99

Jims Hydrosolid Tappet. Standard .8425" O.D – 1984–1999 Evo Big Twin; 1986–1990…

Only 3 left!

Jims Hydrosolid Tappet. Standard .8425" O.D – 1984–1999 Evo Big Twin; 1986–1990… Must be used with adjustable pushrods. Jims ''Hydrosolid'' tappets...

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£165.35
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£165.35
£146.99
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£146.99
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£174.92
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£155.49
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Jims Powerglide Hydraulic Tappet. Standard .731" O.D – 1953–1984 Big Twin

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Jims Powerglide Hydraulic Tappet. Standard .731" O.D – 1953–1984 Big Twin The hydraulics used will work with both hydraulic and solid style camshaf...

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£174.92
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£174.92
£155.49
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£282.89
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Jims Upper Valve Spring Collars. Titanium – 1984–2004 Big Twin; Twin Cam B…

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Jims Upper Valve Spring Collars. Titanium – 1984–2004 Big Twin; Twin Cam B… Compatible with 1.437" - 1.500" spring diameter. 10° angled for OEM H-D...

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£280.74
£282.89
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£282.89
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£447.95
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£447.95
£379.60
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£379.60

Jims Evo B.T. Pro-Lite Worksavers Aluminum Pushrod Set – 1984–1999 Evo Big Twin

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Jims Evo B.T. Pro-Lite Worksavers Aluminum Pushrod Set – 1984–1999 Evo Big Twin Quick installs without removing rocker covers. Manufactured from bl...

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£447.95
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£447.95
£379.60
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£379.60
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£204.61
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£204.61
£183.10
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£183.10

Shovelhead ''Slim JIMS'' Aluminum Adj. Pushrod Set – 1966–1984 Shovelhead with OEM Style…

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Shovelhead ''Slim JIMS'' Aluminum Adj. Pushrod Set – 1966–1984 Shovelhead with OEM Style… For models with OEM style hydraulic units only for use wi...

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£204.61
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£204.61
£183.10
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£183.10
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£19.56
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Jims Pushrod Cover Spacer Set. .155" Thick – 1936–2025 Big Twin; 1957–1990 XL…

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Jims Pushrod Cover Spacer Set. .155" Thick – 1936–2025 Big Twin; 1957–1990 XL… Used to space-out stock length pushrod covers when longer than stock...

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£19.56
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Jims Pushrod Cover Spacer Set. .275" Thick – 1936–2025 Big Twin; 1957–1990 XL…

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Jims Pushrod Cover Spacer Set. .275" Thick – 1936–2025 Big Twin; 1957–1990 XL… Used to space-out stock length pushrod covers when longer than stock...

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£18.06 - £18.06
£18.06
£19.56
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£19.56
£456.80 - £456.80
£456.80
£460.30
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£460.30

Jims Valve Spring Kit, Race. Titanium .675" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin…

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Jims Valve Spring Kit, Race. Titanium .675" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin… Race valve spring set. Titanium top collars. Kits includ...

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£456.80
£460.30
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£325.81
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Jims Valve Spring Kit. Titanium .600" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin…

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Jims Valve Spring Kit. Titanium .600" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin… Street & Performance. Titanium top collars. Kits include t...

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£323.33
£325.81
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£325.81
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£47.05
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£47.05
£46.39
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£46.39

Jims Pinion Shaft Bushing. +.005" – 1936–1953 Big Twin

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Jims Pinion Shaft Bushing. +.005" – 1936–1953 Big Twin Bronze. O.D. 1.0020". Used in cam cover. Oversized replacement for standard sized OEM 25582-...

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£47.05
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£47.05
£46.39
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£46.39
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£925.70
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£925.70
£796.08
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£796.08

Jims ''A Cut Above'' Billet Cam Cover L73-92 B.T. Polished – L1973–1992 Big Twin

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Jims ''A Cut Above'' Billet Cam Cover L73-92 B.T. Polished – L1973–1992 Big Twin Hidden mount screws; billet 7075-T651 aluminum and exact positioni...

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£925.70
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£925.70
£796.08
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£796.08
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£61.25
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£58.31
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£58.31

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

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Gardner-Westcott Rocker Box Top Bolt Kit. Flanged Hex, Chrome – 1999–2017 Twin Cam Chrome. Flanged domed hex head bolts. Includes washers. Fitment ...

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£61.25
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£61.25
£58.31
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£58.31
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£30.85
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£30.85
£30.47
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£30.47

Colony High-torque – 1936–1984 Big Twin

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Colony High-torque – 1936–1984 Big Twin Black oxide; no washers; provides extra space for big bore cilinders but fits stock bore cylinders equally ...

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£30.85
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£30.85
£30.47
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£30.47
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£18.18
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£18.18
£17.31
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£17.31

MCS Sprocket Shaft Bearing Spacer Shim .098" – 1969–2002 Big Twin; Twin Cam B

Only 2 left!

MCS Sprocket Shaft Bearing Spacer Shim .098" – 1969–2002 Big Twin; Twin Cam B Used to set correct pre-load onto sprocket shaft bearings. Approx. di...

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£18.18
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£18.18
£17.31
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£17.31
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£5.39
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£5.14
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£5.14

MCS Sprocket Shaft Bearing Spacer Shim .094" – 1969–2002 Big Twin; Twin Cam B

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MCS Sprocket Shaft Bearing Spacer Shim .094" – 1969–2002 Big Twin; Twin Cam B Used to set correct pre-load onto sprocket shaft bearings. Approx. di...

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£5.39
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£5.39
£5.14
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£5.14
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£7.48
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£7.48
£7.12
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£7.12

MCS Sprocket Shaft Bearing Spacer Shim .098" – 1977–2003 XL Sportster

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MCS Sprocket Shaft Bearing Spacer Shim .098" – 1977–2003 XL Sportster Used to correct pre-load on the sprocket shaft bearing. Note: See 965410 for ...

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£7.48
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£7.48
£7.12
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£7.12
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£7.48
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£7.12
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£7.12

MCS Sprocket Shaft Bearing Spacer Shim .100" – 1977–2003 XL Sportster

Only 2 left!

MCS Sprocket Shaft Bearing Spacer Shim .100" – 1977–2003 XL Sportster Used to correct pre-load on the sprocket shaft bearing. Note: See 965410 for ...

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£7.48
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£7.48
£7.12
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£7.12
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£18.18
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£17.29
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£17.29

MCS Sprocket Shaft Bearing Spacer Shim .120" – 1969–2002 Big Twin; Twin Cam B

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MCS Sprocket Shaft Bearing Spacer Shim .120" – 1969–2002 Big Twin; Twin Cam B Used to set correct pre-load onto sprocket shaft bearings. Approx. di...

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£18.18
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£18.18
£17.29
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£17.29
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