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Sportster – Engine & Gaskets

Browse engine & gaskets selected for Harley-Davidson Sportster motorcycles. Current products cover engine components and gaskets, seals and service parts, depending on the specification and application. Check each listing for exact model-year fitment, dimensions and installation requirements.

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£23.01
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Cometic Valve Stem Seal Set (8Pk) – 2018–2025 Softail; 2017–2025…

Only 2 left!

Cometic Valve Stem Seal Set (8Pk) – 2018–2025 Softail; 2017–2025… Viton rubber. OEM replacement reference 18100044. Fitment 18-25 Softail; 17-25 FL...

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£21.91
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£6.09
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Cometic Induction Module / Throttle Body O-ring Kit – 2018–2024 Softail; 2017–2024…

Out of stock

Cometic Induction Module / Throttle Body O-ring Kit – 2018–2024 Softail; 2017–2024… OEM replacement reference 91800058 hardware kit Fitment 18-24 S...

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£6.09
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£162.20
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£159.93
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Cometic Gasket Primary Cover. .060" AFM – 2017–2025 FLT/Touring; 2017–2025 Trikes

Out of stock

Cometic Gasket Primary Cover. .060" AFM – 2017–2025 FLT/Touring; 2017–2025 Trikes .060" thick AFM (Aluminum Foamet Material). OEM replacement refer...

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£162.20
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£159.93
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£159.93
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£73.98
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£70.41
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£70.41

Cometic Primary Cover Gasket & Seal Kit. AFM – 2017–2025 FLT/Touring; 2017–2025 Trikes

Out of stock

Cometic Primary Cover Gasket & Seal Kit. AFM – 2017–2025 FLT/Touring; 2017–2025 Trikes Complete outer & inner primary cover gasket sets inc...

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£73.98
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£73.98
£70.41
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£27.71
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£26.36
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Cometic Cylinder Base Gasket Set. RCS 4.320" Big Bore – 2018–2024 Softail; 2017–2025…

Out of stock

Cometic Cylinder Base Gasket Set. RCS 4.320" Big Bore – 2018–2024 Softail; 2017–2025… Front & rear gasket for one engine. .014" thick RCS (Rubb...

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£27.71
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£11.05
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Cometic O-ring Temperature MAP Sensor – 2018–2024 Softail; 2017–2024…

Out of stock

Cometic O-ring Temperature MAP Sensor – 2018–2024 Softail; 2017–2024… Viton rubber. Replacement for the o-ring used on OEM 32700065 MAP sensor. Not...

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£11.05
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Cometic O-ring M8 Breather Assembly – 2017–2025 Gen1 M8 Models: 2017–2025 M8…

Only 2 left!

Cometic O-ring M8 Breather Assembly – 2017–2025 Gen1 M8 Models: 2017–2025 M8… Viton rubber. OEM replacement reference 11900116 Fitment 17-25 Gen1 M...

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£11.05
£11.05 - £11.05
£11.05
£10.50
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£23.23
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Cometic Gasket Rocker Cover Lower – 2018–2025 Softail; 2017–2025…

Out of stock

Cometic Gasket Rocker Cover Lower – 2018–2025 Softail; 2017–2025… Rubber. OEM replacement reference 25700425 Fitment 18-25 Softail; 17-25 FLT/Touri...

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£22.05
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Cometic Gasket Upper Rocker Cover. .020" RCS – 2018–2025 Softail; 2017–2025…

Only 2 left!

Cometic Gasket Upper Rocker Cover. .020" RCS – 2018–2025 Softail; 2017–2025… .020" RCS (Rubber Coated Steel). OEM replacement reference 25700372; 2...

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£22.05
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£21.00
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£32.44
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£32.44
£30.88
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£30.88

Cometic Cam Gear Change Gasket Kit – 2018–2025 Softail; 2017–2025…

Out of stock

Cometic Cam Gear Change Gasket Kit – 2018–2025 Softail; 2017–2025… Camshaft service kit; complete with all gaskets and seals you need when the cams...

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£32.44
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£32.44
£30.88
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£30.88
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£27.71
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£27.71
£26.38
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£26.38

Cometic Cylinder Base Gasket Set .014" RCS – 2018–2024 Softail; 2017–2025…

Only 2 left!

Cometic Cylinder Base Gasket Set .014" RCS – 2018–2024 Softail; 2017–2025… Front & rear cylinder set. .014" RCS (Rubber Coated Steel); an embos...

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£27.71
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£26.38
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£3.07
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Cometic Throttle Body to Air Cleaner Housing Gasket. Fiber – 2018–2024 114"/117" Softail; 2017–2025…

Only 2 left!

Cometic Throttle Body to Air Cleaner Housing Gasket. Fiber – 2018–2024 114"/117" Softail; 2017–2025… .031" thick Fiber. Fits 114"/117" models with ...

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£3.07
£2.71
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£3.81
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Cometic Piston Oiler Jet Gasket – 2018–2025 Softail; 2017–2025…

Only 2 left!

Cometic Piston Oiler Jet Gasket – 2018–2025 Softail; 2017–2025… .032" AFM. Used between piston cooling jet and crankcase. Fits front & rear. Re...

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£3.81
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£3.81
£3.40
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£3.40
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£35.57
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£33.86
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Cometic Cam Cover Gaskets. .032" AFM – 2018–2025 Softail; 2017–2025…

Only 2 left!

Cometic Cam Cover Gaskets. .032" AFM – 2018–2025 Softail; 2017–2025… .032" thick AFM (Aluminum Foamet Material). OEM replacement reference 25700370...

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£35.57
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£35.57
£33.86
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£33.86
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£33.29
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£33.29
£31.70
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£31.70

Cometic Gasket Tappet Cover,.032" AFM – 2018–2025 Softail; 2017–2025…

Only 2 left!

Cometic Gasket Tappet Cover,.032" AFM – 2018–2025 Softail; 2017–2025… .032" thick AFM (Aluminum Foamet Material). These gaskets have an aluminum ba...

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£33.29
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£33.29
£31.70
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£31.70
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£68.27
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£68.27
£64.98
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£64.98

Cometic Head & Base Gasket Kit .030" MLS 4.125" – 2018–2025 Softail; 2017–2025…

Only 2 left!

Cometic Head & Base Gasket Kit .030" MLS 4.125" – 2018–2025 Softail; 2017–2025… .030" MLS (Multi Layer Steel) head & .020" RCS (Rubber Coat...

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£68.27
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£68.27
£64.98
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£64.98
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£51.20
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£51.20
£48.73
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£48.73

Cometic Cylinder Head Gasket Set 3.937" Bore .030" MLS – 2018–2024 107" Softail; 2017–2023 107"…

Only 2 left!

Cometic Cylinder Head Gasket Set 3.937" Bore .030" MLS – 2018–2024 107" Softail; 2017–2023 107"… .030" MLS. 3.937" stock bore 107" M8 engines. OEM ...

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£51.20
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£48.73
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£38.78
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£38.78

James Gaskets Cylinder Base Gasket Set. 4-1/8" Bore. .032" Foamet – S&S Evo Big Twin Style T124" Engines

Only 2 left!

James Gaskets Cylinder Base Gasket Set. 4-1/8" Bore. .032" Foamet – S&S Evo Big Twin Style T124" Engines .032" Foamet (Foam Coated Metal). Comp...

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£38.48
£38.78
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£24.81
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£24.81
£24.46
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£24.46

James Gaskets Sprocket Shaft Oil Seals – 2018–2026 Softail; 2017–2026…

Only 2 left!

James Gaskets Sprocket Shaft Oil Seals – 2018–2026 Softail; 2017–2026… Double lip. OEM replacement reference 11000134 Fitment 18-26 Softail; 17-26 ...

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£24.81
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£24.81
£24.46
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£24.46
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£66.72
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£66.72

James Gaskets Primary Cover Gasket & Seal Kit. Foamet with Bead – 2017–2025 FLT/Touring; 2017–2025 Trikes

Only 3 left!

James Gaskets Primary Cover Gasket & Seal Kit. Foamet with Bead – 2017–2025 FLT/Touring; 2017–2025 Trikes With Foamet (aluminum based foam) wit...

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£66.21 - £66.21
£66.21
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£72.48
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£72.48

James Gaskets Rocker Cover Gasket Kit. M8. RCM – 2018–2025 Softail; 2017–2025…

Only 3 left!

James Gaskets Rocker Cover Gasket Kit. M8. RCM – 2018–2025 Softail; 2017–2025… Complete rocker box gasket kit with RCM (Rubber Coated Metal) top; r...

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£71.93 - £71.93
£71.93
£72.48
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£49.57
£49.95
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£49.95

James Gaskets Cam Gear Change Gasket Kit. M8 – 2018–2025 Softail; 2017–2025…

Only 2 left!

James Gaskets Cam Gear Change Gasket Kit. M8 – 2018–2025 Softail; 2017–2025… Camshaft service kit; complete with all gaskets and seals you need whe...

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£49.57 - £49.57
£49.57
£49.95
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£119.89 - £119.89
£119.89
£122.60
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James Gaskets Motor Gasket & Seal Kit – 2018–2024 Softail; 2017–2023 Touring.…

Only 3 left!

James Gaskets Motor Gasket & Seal Kit – 2018–2024 Softail; 2017–2023 Touring.… .045" MLS (multi Layer Steel) head gaskets. 3.937" bore for stoc...

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£119.89 - £119.89
£119.89
£122.60
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£108.28
£110.73
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£110.73

James Gaskets Top End Gasket Kit. 107/114/117" M8 – 2018–2024 Softail; 2017–2025 Touring…

Only 3 left!

James Gaskets Top End Gasket Kit. 107/114/117" M8 – 2018–2024 Softail; 2017–2025 Touring… Fits 107" (3.937" bore); 114" (4.016" bore) and 117"/121"...

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£108.28 - £108.28
£108.28
£110.73
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£110.73

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