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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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Cometic Oil Seal Starter Shaft. Rubber OD – 80-E84 FLT/Touring; FXR

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Cometic Oil Seal Starter Shaft. Rubber OD – 80-E84 FLT/Touring; FXR OEM replacement reference 12043. Fitment 80-E84 FLT/Touring; FXR (NU) Product D...

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£11.28
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£10.38
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£10.38

Cometic Oil Seal Transmission Mainshaft 5Th Gear – 1991–2006 Big Twin

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Cometic Oil Seal Transmission Mainshaft 5Th Gear – 1991–2006 Big Twin OEM replacement reference 12035B. Officially fits 99-06 Big Twins but will re...

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£12.99
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£12.37
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£12.37

Cometic Oil Seal Transmission Main Drive Gear. 4Th Gear – L66-E81 4-Speed Big Twin

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Cometic Oil Seal Transmission Main Drive Gear. 4Th Gear – L66-E81 4-Speed Big Twin Metal O.D.. OEM replacement reference 12022. Fitment L66-E81 4-s...

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£12.37
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£12.37
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£9.69
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£8.92
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£8.92

Cometic Oil Seal Clutch Hub Nut – 65-E84 Big Twin

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Cometic Oil Seal Clutch Hub Nut – 65-E84 Big Twin With standard rubber OD. OEM replacement reference 12014. Fitment 65-E84 Big Twin (NU) Product De...

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£8.92
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£12.37
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£12.37

Cometic Oil Seal Transmission Maindrive Gear. Metal OD – 65-E66 4-Speed Big Twin; 4-Speed…

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Cometic Oil Seal Transmission Maindrive Gear. Metal OD – 65-E66 4-Speed Big Twin; 4-Speed… For 4-speed models fits 4th gear; for 5-speed models fit...

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£13.86
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£13.20
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£13.20

Cometic Oil Seal Shifter Shaft Cover – L1979–1986 4-Speed Big Twin

Out of stock

Cometic Oil Seal Shifter Shaft Cover – L1979–1986 4-Speed Big Twin Metal OD. With rotary top transmission. Fits 33174-79 shifter shaft cover. OEM r...

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£4.79
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£4.40
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£4.40

Cometic. O-ring Clutch Cable – 1987–2025 Softail; 1991–2017 Dyna…

Out of stock

Cometic. O-ring Clutch Cable – 1987–2025 Softail; 1991–2017 Dyna… Used in transmission end cover. Fits models with mechanical actuated clutch and m...

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£9.69
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£8.92
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£8.92

Cometic O-ring Mainshaft Needle Bearing – L1984–1986 4-Speed Big Twin

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Cometic O-ring Mainshaft Needle Bearing – L1984–1986 4-Speed Big Twin OEM replacement reference 11166. Fitment L84-86 4-speed Big Twin (NU) Product...

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£8.92
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£15.38
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£14.65
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£14.65

Cometic Quad Oil Seal Transmission Mainshaft Bearing – L1984–2006 5-Speed Big Twin; 1991–2005…

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Cometic Quad Oil Seal Transmission Mainshaft Bearing – L1984–2006 5-Speed Big Twin; 1991–2005… Small quad o-ring oil seal. Nitrile rubber. OEM repl...

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£14.65
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£14.65
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£8.01
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£7.37
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£7.37

Cometic O-ring Transmission Mainshaft. Right End – L1984 FXR; FXRS; 1984–1986 5-Speed Big…

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Cometic O-ring Transmission Mainshaft. Right End – L1984 FXR; FXRS; 1984–1986 5-Speed Big… 1 used. OEM replacement reference 11162. Fitment L1984 F...

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£8.01
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£9.69
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£8.92
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Cometic O-ring Countershaft / Rocker Arm Shaft – 1965–1986 4-Speed Big Twin 1 Used :…

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Cometic O-ring Countershaft / Rocker Arm Shaft – 1965–1986 4-Speed Big Twin 1 Used :… OEM replacement reference 11115. Fitment 65-86 4-speed Big Tw...

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£8.92
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£10.23
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£10.23
£9.42
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£9.42

Cometic Drain Plug Seal Washer. White Nylon – 1980–1992 FLT/Touring; 1982–1994 FXR

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Cometic Drain Plug Seal Washer. White Nylon – 1980–1992 FLT/Touring; 1982–1994 FXR 1 used on the transmission drain plug. 1/2" ID. OEM replacement ...

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£10.23
£9.42
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£9.42
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£5.25
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£5.25
£4.83
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£4.83

Cometic Shifter Shaft O-ring – 1990–2026 Softail with Forward Controls

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Cometic Shifter Shaft O-ring – 1990–2026 Softail with Forward Controls Used behind shifter arm on transmission. Will not fit mid-control models. OE...

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£4.83
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£4.83
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£15.38
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£15.38
£14.65
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£14.65

Cometic Shifter Shaft Seal – 1974–1985 FX

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Cometic Shifter Shaft Seal – 1974–1985 FX 1 used in inner primary; 1 used in inspection cover. OEM replacement reference 60641-74. Fitment 74-85 FX...

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£14.65
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£14.65
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£13.86
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£13.86
£13.20
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£13.20

Cometic Quad Oil Seal Shifter Lever – 82-E84 FXR

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Cometic Quad Oil Seal Shifter Lever – 82-E84 FXR 2 used. OEM replacement reference 11148. Fitment 82-E84 FXR (NU) Product Details Brand: Cometic ...

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£13.86
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£13.20

Cometic O-ring Shifter Shaft – L1984–1994 FXR; 1987–1989 Softail…

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Cometic O-ring Shifter Shaft – L1984–1994 FXR; 1987–1989 Softail… OEM replacement reference 11117A. Fitment L84-94 FXR; 87-89 Softail; 91-05 Dyna (...

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£9.56
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£8.79
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£8.79

Cometic. Gasket Starter Solenoid. Foam – L1965–1982 FL; 71-E84 FX; 1967–1980 XL…

Out of stock

Cometic. Gasket Starter Solenoid. Foam – L1965–1982 FL; 71-E84 FX; 1967–1980 XL… Foam seal. OEM replacement reference 60645-65. Fitment L65-82 FL; ...

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£9.69
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£8.92
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Cometic Gasket Oil Deflector Plate Starter. Fiber – 1965–1986 FL; FX; 1980–1984 FLT/Touring…

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Cometic Gasket Oil Deflector Plate Starter. Fiber – 1965–1986 FL; FX; 1980–1984 FLT/Touring… Fiber. Gasket for 60516-65A (MCS 504040) oil defletor....

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£8.92
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£31.00
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£31.00
£29.52
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£29.52

Cometic Gasket Starter Hole Cover. Fiber – 1971–1978 FX Models & Other 65-E84…

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Cometic Gasket Starter Hole Cover. Fiber – 1971–1978 FX Models & Other 65-E84… Fiber. Gasket for the OEM 60514-65 starter hole cover plate (blo...

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£31.00
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£31.00
£29.52
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£29.52
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£24.58
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£24.58
£23.40
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£23.40

Cometic Oil Seal Starter Shaft Housing – 1980–1986 Big Twin with Rear Belt Drive

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Cometic Oil Seal Starter Shaft Housing – 1980–1986 Big Twin with Rear Belt Drive OEM replacement reference 31341-80. Fitment 80-86 Big Twin with re...

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£23.40
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£16.18
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£15.41
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£15.41

Cometic Gasket Starter Cover. .031" Fiber – 1982 Classic; 1983–1984 FLH; 1980–1986…

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Cometic Gasket Starter Cover. .031" Fiber – 1982 Classic; 1983–1984 FLH; 1980–1986… .031" fiber. For belt drive models only. OEM replacement refere...

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£15.41
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£15.41
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£8.01
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£7.37
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Cometic Gasket Starter Cover Housing. .031" Fiber – 1982–1983 FL; 1980–1985 FX. With Rear…

Out of stock

Cometic Gasket Starter Cover Housing. .031" Fiber – 1982–1983 FL; 1980–1985 FX. With Rear… .031" fiber. OEM replacement referecne 31320-80. Cometic...

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£21.56
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£21.56
£20.53
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£20.53

Cometic Oil Seal Starter Shaft – 1989–1993 Big Twin

Out of stock

Cometic Oil Seal Starter Shaft – 1989–1993 Big Twin Fits backside of inner primary cover where it seals the starter shaft. OEM replacement referenc...

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£20.53
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£20.53
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£13.20
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£13.20

Cometic Oil Seal Starter Shaft – L1984–1988 5-Speed Big Twin

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Cometic Oil Seal Starter Shaft – L1984–1988 5-Speed Big Twin Used in rear of inner primary housing. OEM replacement reference 12051. Fitment L84-88...

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