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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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£16.95
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Cometic Oil Seal Primary Cover Mainshaft – 1970–1984 FL; FX

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Cometic Oil Seal Primary Cover Mainshaft – 1970–1984 FL; FX Metal OD. Fits back side of inner primary cover; seals mainshaft support bearing. OEM r...

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£16.14
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£74.97
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£71.37
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£71.37

Cometic O-ring Inner Primary Cover to Crankcase – 1970–1982 FL; 1971–1984 FX; 1979–1983…

Out of stock

Cometic O-ring Inner Primary Cover to Crankcase – 1970–1982 FL; 1971–1984 FX; 1979–1983… OEM replacement reference 11125. Fitment 70-82 FL; 71-84 F...

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£71.37
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£7.80
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Cometic Seal Washer Derby Cover. RCS – L1984–1998 Big Twin

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Cometic Seal Washer Derby Cover. RCS – L1984–1998 Big Twin 3 used. Rubber coated steel. Seal washers for derby cover mount screws. 1/4" ID. OEM rep...

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£7.18
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£19.97
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£19.01
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£19.01

Cometic O-ring Derby Cover – L1984–1998 Big Twin

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Cometic O-ring Derby Cover – L1984–1998 Big Twin OEM replacement reference 25416-84; 25416-84A; 25416-84B. Fitment L84-98 Big Twin (NU) Product Det...

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£16.95
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Cometic Oil Seal Sprocket Shaft – 1970–1999 Big Twin; S&S X-Wedge Engines…

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Cometic Oil Seal Sprocket Shaft – 1970–1999 Big Twin; S&S X-Wedge Engines… Fits left crankcase. OEM replacement reference 12026A; 12026B. Fitme...

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£16.14
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£16.14
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£11.28
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£10.38
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£10.38

Cometic Oil Pump Body to Cover Gasket. Fiber – 1992–1999 Evo Big Twin

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Cometic Oil Pump Body to Cover Gasket. Fiber – 1992–1999 Evo Big Twin OEM replacement reference 26276-92A. Fitment 92-99 Evo Big Twin (NU) Product ...

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£11.28
£10.38
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£10.38
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£9.69
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£8.92
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£8.92

Cometic Oil Pump Body to Cover Gasket. .010" Fiber – L1980–1991 Big Twin

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Cometic Oil Pump Body to Cover Gasket. .010" Fiber – L1980–1991 Big Twin .010" rubber coated fiber. OEM replacement reference 26276-80A. Fitment L8...

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£8.92
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£8.92
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£11.28
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£10.38
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£10.38

Cometic Oil Pump Body to Case Gasket. .010" Fiber – L1980–1991 Big Twin

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Cometic Oil Pump Body to Case Gasket. .010" Fiber – L1980–1991 Big Twin .010" rubber coated fiber. Fiber is a premium hi-temperature; hi-density cr...

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£10.38
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£11.28
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Cometic Oil Pump Bocy to Cover Gasket. Fiber – 1992–1999 Evo Big Twin

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Cometic Oil Pump Bocy to Cover Gasket. Fiber – 1992–1999 Evo Big Twin Rubber coated fiber. Fiber is a premium hi-temperature; hi-density creep resi...

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£11.28
£10.38
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£10.38
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£13.86
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£13.20

Cometic Oil Seal Oil Pump Drive Shaft – L1958–1976 XL Sportster; 1968–1999 Big…

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Cometic Oil Seal Oil Pump Drive Shaft – L1958–1976 XL Sportster; 1968–1999 Big… 1 used. Fits OEM & S&S standard cast and billet oil pumps (...

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£13.86
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£13.20
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£13.20
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£27.04
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£25.75
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£25.75

Cometic Gasket Transmission Top Cover. .031" Fiber – 1999–2005 Dyna

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Cometic Gasket Transmission Top Cover. .031" Fiber – 1999–2005 Dyna .031" fiber. OEM replacement reference 34917-99; 34917-99A; 34917-99B. Cometic'...

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£27.04
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£27.04
£25.75
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£25.75
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£52.56
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£50.04

Cometic Gasket Transmission Oil Spout (Filler) .031" Fiber – 1993–2006 FLT/Touring

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Cometic Gasket Transmission Oil Spout (Filler) .031" Fiber – 1993–2006 FLT/Touring .031" fiber. OEM replacement reference 62432-93B. Cometic''s fib...

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£52.56
£50.04
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£27.10
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£27.10
£25.80
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£25.80

Cometic Gasket Transmission Top Cover. .031" Fiber – 1986–1999 Big Twin

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Cometic Gasket Transmission Top Cover. .031" Fiber – 1986–1999 Big Twin .031" fiber. OEM replacement reference 34904-86; 34904-86A; 34904-86B; 3490...

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£27.10
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£25.80
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£25.80
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£29.01
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£27.62
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£27.62

Cometic Gasket Transmission End Cover. .031" Fiber – 1987–2006 Big Twin

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Cometic Gasket Transmission End Cover. .031" Fiber – 1987–2006 Big Twin .031" fiber. Used between the transmission bearing housing and the transmis...

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£29.01
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£29.01
£27.62
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£13.92
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£13.25
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Cometic O-ring Neutral Switch / Oil Pump / Crankcase – Neutral Switch: 1998–2006 Big Twin…

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Cometic O-ring Neutral Switch / Oil Pump / Crankcase – Neutral Switch: 1998–2006 Big Twin… OEM replacement reference 11290. Fitment Neutral switch:...

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£13.92
£13.25
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£18.53
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£18.53
£17.64
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£17.64

Cometic Seal Manifold Air Pressure Sensor – 2000–2016 Softail; 2018–2025 Softail…

Out of stock

Cometic Seal Manifold Air Pressure Sensor – 2000–2016 Softail; 2018–2025 Softail… Temperature / MAP sensor. 1 used. Fits both carburetor and inject...

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£18.53
£17.64
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£17.64
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£7.49
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£7.49
£6.89
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£6.89

Cometic Cam Position Sensor O-ring – 1999–2000 Dyna; 2000 Softail and…

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Cometic Cam Position Sensor O-ring – 1999–2000 Dyna; 2000 Softail and… OEM replacement reference 11288. Fitment 99-00 Dyna; 2000 Softail and 99-01 ...

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£7.49
£6.89
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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 – 1994–2006 Big Twin

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Cometic Oil Seal Starter Shaft – 1994–2006 Big Twin Fits backside of inner primary cover where it seals the starter shaft. OEM replacement referenc...

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£21.56
£20.53
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£26.19
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£26.19
£24.93
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£24.93

Cometic O-ring Inner Primary Housing to Crankcase – 1984–2006 Softail; FLT/Touring…

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Cometic O-ring Inner Primary Housing to Crankcase – 1984–2006 Softail; FLT/Touring… OEM replacement reference 11147; 11147A. Fitment 84-06 Softail;...

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£26.19
£24.93
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£24.93
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£162.20
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£162.20
£159.95
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£159.95

Cometic Gasket Primary Cover. .060" AFM – 1989–2006 Softail; 1991–2005 Dyna

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Cometic Gasket Primary Cover. .060" AFM – 1989–2006 Softail; 1991–2005 Dyna .060" thick AFM (Aluminum Foamet Material). For 5-speed models. OEM rep...

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£162.20
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£162.20
£159.95
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£159.95
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£162.20
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£162.20
£159.95
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£159.95

Cometic Gasket Primary Cover. .060" AFM – 1994 FXR; 1994–2006 FLT/Touring

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Cometic Gasket Primary Cover. .060" AFM – 1994 FXR; 1994–2006 FLT/Touring .060" AFM (Aluminum Foamet Material). OEM replacement reference 34901-94C...

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£162.20
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£159.95
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£102.23
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£98.69
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£98.69

Cometic Gasket Transmission Oil Pan. Fiber – 1999–2016 FLT/Touring

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Cometic Gasket Transmission Oil Pan. Fiber – 1999–2016 FLT/Touring Fiber. OEM replacement reference 26077-99A. Cometic''s fiber gaskets are made fr...

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£102.23
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£102.23
£98.69
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£98.69
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£102.23
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£102.23
£98.69
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£98.69

Cometic Gasket Transmission Oil Pan. Fiber – 1999–2017 Dyna

Out of stock

Cometic Gasket Transmission Oil Pan. Fiber – 1999–2017 Dyna Reinforced fiber. OEM replacement reference 26702-99A. Fitment 99-17 Dyna (NU) Product ...

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£102.23
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£102.23
£98.69
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£5.45
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Cometic O-ring Speedo Sensor/Cooling Jet/Oil Line Fitting – O-ring; Speedometer Sensor (1 Used):…

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Cometic O-ring Speedo Sensor/Cooling Jet/Oil Line Fitting – O-ring; Speedometer Sensor (1 Used):… Multiple use. Speedo sensor; piston cooling jet; ...

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