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Engine & Performance

Choose from Engine & Performance products for Harley-Davidson, American V-twin and compatible motorcycle applications. Across the range you will find products for engine components. Compatibility varies, so match the stated model, year and technical details before ordering.

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S&S Cycle Pinion Shaft Gear Nut Pinion Gear Nut
£52.86 - £52.86
£52.86
£52.86 - £52.86
£52.86

S&S Cycle Pinion Shaft Gear Nut Pinion Gear Nut #33-4244

in stock

DescriptionPinion Shaft Gear NutOEM or better qualityMade in the USAAlso fits '90-'99 engines with S&S flywheels.Specifications Type: Pinion S...

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£52.86 - £52.86
£52.86
£52.86 - £52.86
£52.86
S&S Cycle Parallel Key Steel
£8.50 - £8.50
£8.50
£8.50 - £8.50
£8.50

S&S Cycle Parallel Key Steel #106-1348

in stock

DescriptionParallel KeySteel individual key .188” x .150” x .420”Made in the U.S.A.Specifications Colour/Finish: Steel Units: Each Material: Ste...

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£8.50 - £8.50
£8.50
£8.50 - £8.50
£8.50
Kuryakyn Inner Primary Front Cover Extension
£53.83 - £53.83
£53.83
£53.83 - £53.83
£53.83

Kuryakyn Inner Primary Front Cover Extension #KUR8370

in stock

DescriptionInner Primary Front Cover ExtensionPuts the finishing touch on your primaryCovers the shift pivot area and grease fittingEasily installe...

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£53.83 - £53.83
£53.83
£53.83 - £53.83
£53.83
Kuryakyn Precision® Tappet Block Accent Cover Black Gloss
£95.91 - £95.91
£95.91
£95.91 - £95.91
£95.91

Kuryakyn Precision® Tappet Block Accent Cover Black Gloss #KUR6440

in stock

DescriptionPrecision® Tappet Block Accent CoverClean, simple addition that really adds style to the engineBrilliant gloss black finishSpecification...

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£95.91 - £95.91
£95.91
£95.91 - £95.91
£95.91
S&S Cycle Cam Cover Kit Natural Silver 356 T-6 Aluminium
£625.46 - £625.46
£625.46
£625.46 - £625.46
£625.46

S&S Cycle Cam Cover Kit Natural Silver 356 T-6 Aluminium #31-0203

in stock

DescriptionCam Cover KitMachined from tough 356-T6 aluminium castings, the same material used to make S&S crankcasesFeatures an inner cast alum...

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£625.46 - £625.46
£625.46
£625.46 - £625.46
£625.46
Kuryakyn One Piece Inner Primary Cover Chrome Die-Cast
£159.55 - £159.55
£159.55
£159.55 - £159.55
£159.55

Kuryakyn One Piece Inner Primary Cover Chrome Die-Cast #KUR7780

in stock

DescriptionOne Piece Inner Primary CoverHigh-quality, chrome-plated, die-castPrecise fit and finished edges enhance the primary areaFour mounting p...

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£159.55 - £159.55
£159.55
£159.55 - £159.55
£159.55
S&S Cycle Billet Tappet Guides Chrome Billet Aluminium Kit
£490.36 - £490.36
£490.36
£490.36 - £490.36
£490.36

S&S Cycle Billet Tappet Guides Chrome Billet Aluminium Kit #106-5428

Only 1 left!

DescriptionBillet Tappet GuidesMachined from solid billet aluminium with chrome finishPart of S&S's top-of-the-line engine kitsAvailable for en...

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£490.36 - £490.36
£490.36
£490.36 - £490.36
£490.36
Kuryakyn Oil Filler Spout Cover Chrome Oil Filter Die-Cast
Sold out
£75.37 - £75.37
£75.37
£75.37 - £75.37
£75.37

Kuryakyn Oil Filler Spout Cover Chrome Oil Filter Die-Cast #KUR8264

Out of stock

DescriptionOil Filler Spout CoverAdds a chrome highlight to the area around the oil filler neckDie-cast constructionCompatible with Harley Davidson...

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£75.37 - £75.37
£75.37
£75.37 - £75.37
£75.37
Sold out
S&S Cycle Gasket, Primary Cover, 1990–'99 Softail and Dyna
Sold out
£51.46 - £51.46
£51.46
£51.46 - £51.46
£51.46

S&S Cycle Gasket, Primary Cover, 1990–'99 Softail and Dyna #560-0457

Out of stock

DescriptionGasket, Primary Cover, 1990–'99 Softail and DynaS&S Gasket, Primary Cover, 1990–'99 Softail and DynaSpecifications Product Name: Ga...

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£51.46 - £51.46
£51.46
£51.46 - £51.46
£51.46
Sold out
S&S Cycle Gasket Breather Paper
Sold out
£7.07 - £7.07
£7.07
£7.07 - £7.07
£7.07

S&S Cycle Gasket Breather Paper #90-4078

Out of stock

DescriptionGasket BreatherS+S Cycle Gasket, Breather Cover, Stock Pattern, PaperSpecifications Units: Each Type: Breather Product Name: Gasket ...

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£7.07 - £7.07
£7.07
£7.07 - £7.07
£7.07
Sold out
S&S Cycle Seal Sprocket Shaft Bearing Set 5 Pack
£55.12 - £55.12
£55.12
£55.12 - £55.12
£55.12

S&S Cycle Seal Sprocket Shaft Bearing Set 5 Pack #31-4110

Only 4 left!

DescriptionSeal Sprocket ShaftSprocket shaft seal for 1936-1999 big twin and S&S KN, P, SH, V and SB series enginesOne required per engine, 5 p...

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£55.12 - £55.12
£55.12
£55.12 - £55.12
£55.12
James Gasket Engine Gasket Kit
£149.77 - £149.77
£149.77
£149.77 - £149.77
£149.77

James Gasket Engine Gasket Kit #JGI-17055-05-X

in stock

DescriptionEngine Gasket KitMade in the USATop-quality gaskets are available as motor sets or top end setsContains gaskets, oil seals and O-rings n...

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£149.77 - £149.77
£149.77
£149.77 - £149.77
£149.77
James Gasket Drain Plug O-Ring 10 Pack
£14.37 - £14.37
£14.37
£14.37 - £14.37
£14.37

James Gasket Drain Plug O-Ring 10 Pack #JGI-ST-11900045-10

in stock

DescriptionDrain Plug O-RingDrain plug O-ring for Harley Davidson modelsSpecifications Units: 10 Pack Application: Drain Plug Product Name: O-Ri...

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£14.37 - £14.37
£14.37
£14.37 - £14.37
£14.37
James Gasket Drain Plug O-Ring 100 Pack
£39.11 - £39.11
£39.11
£39.11 - £39.11
£39.11

James Gasket Drain Plug O-Ring 100 Pack #JGI-11105-100

in stock

DescriptionDrain Plug O-RingDrain plug O-ring for Harley Davidson modelsSold Each.Specifications Application: Drain Plug Product Name: O-Ring Un...

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£39.11 - £39.11
£39.11
£39.11 - £39.11
£39.11
S&S Cycle Oil Pump O-ring Kit Seal
£10.07 - £10.07
£10.07
£10.07 - £10.07
£10.07

S&S Cycle Oil Pump O-ring Kit Seal #500-0326

in stock

DescriptionOil Pump O-ring KitOil pump o-ring kit for Twin Cam modelsSpecifications Product Name: Seal Application: Oil Pump Riding Style: Stree...

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£10.07 - £10.07
£10.07
£10.07 - £10.07
£10.07
S&S Cycle Valve Guide Seals 8 Pack
£21.63 - £21.63
£21.63
£21.63 - £21.63
£21.63

S&S Cycle Valve Guide Seals 8 Pack #90-2158

in stock

DescriptionValve Guide SealsHigh-quality replacement valve guide sealsMade in the USAFor 0.720" and 0.660" lift valve spring (B3 cylinder heads).Sp...

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£21.63 - £21.63
£21.63
£21.63 - £21.63
£21.63
James Gasket O-Ring Coolant Manifold Rubber 25 Pack
£13.00 - £13.00
£13.00
£13.00 - £13.00
£13.00

James Gasket O-Ring Coolant Manifold Rubber 25 Pack #JGI-11900090

in stock

DescriptionO-RingMade in the USASpecifications Riding Style: Street Type: Coolant Manifold Material: Rubber Product Name: O-Ring Units: 25 Pac...

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£13.00 - £13.00
£13.00
£13.00 - £13.00
£13.00
James Gasket O-Ring Breather Rubber 10 Pack
£19.10 - £19.10
£19.10
£19.10 - £19.10
£19.10

James Gasket O-Ring Breather Rubber 10 Pack #JGI-11900116

in stock

DescriptionO-RingMade in the USASpecifications Riding Style: Street Units: 10 Pack Type: Breather Material: Rubber Product Name: O-Ring Part N...

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£19.10 - £19.10
£19.10
£19.10 - £19.10
£19.10
James Gasket Seal
£24.94 - £24.94
£24.94
£24.94 - £24.94
£24.94

James Gasket Seal #JGI-25600455

in stock

DescriptionSealMade in the U.S.A.Specifications Riding Style: Street Product Name: Seal Application: Inner Primary Units: Each Part NumbersItem...

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£24.94 - £24.94
£24.94
£24.94 - £24.94
£24.94
James Gasket Replacement Gaskets, Seals & O-rings For Big Twin Transmissions
£14.22 - £14.22
£14.22
£14.22 - £14.22
£14.22

James Gasket Replacement Gaskets, Seals & O-rings For Big Twin Transmissions #JGI-24400215

in stock

DescriptionReplacement Gaskets, Seals & O-rings For Big Twin TransmissionsMade in the U.S.A.Specifications Units: Each Application: Engine P...

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£14.22 - £14.22
£14.22
£14.22 - £14.22
£14.22
James Gasket Replacement Gaskets, Seals & O-rings For Big Twin Transmissions
£4.57 - £4.57
£4.57
£4.57 - £4.57
£4.57

James Gasket Replacement Gaskets, Seals & O-rings For Big Twin Transmissions #JGI-11000101

in stock

DescriptionReplacement Gaskets, Seals & O-rings For Big Twin TransmissionsMade in the U.S.A.Specifications Units: Each Application: Shifter S...

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£4.57 - £4.57
£4.57
£4.57 - £4.57
£4.57
James Gasket Seal 10 Pack
£26.16 - £26.16
£26.16
£26.16 - £26.16
£26.16

James Gasket Seal 10 Pack #JGI-27300087

in stock

DescriptionSealMade in the U.S.A.Specifications Riding Style: Street Product Name: Seal Application: Intake Manifold Units: 10 Pack Part Number...

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£26.16 - £26.16
£26.16
£26.16 - £26.16
£26.16
James Gasket Seal 5 Pack
£42.84 - £42.84
£42.84
£42.84 - £42.84
£42.84

James Gasket Seal 5 Pack #JGI-25700425

in stock

DescriptionSealMade in the U.S.A.Specifications Product Name: Seal Riding Style: Street Application: Rocker Cover Units: 5 Pack Part NumbersIte...

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£42.84 - £42.84
£42.84
£42.84 - £42.84
£42.84
S&S Cycle O-Ring Custom Replacement Silicone 10 Pack
£19.35 - £19.35
£19.35
£19.35 - £19.35
£19.35

S&S Cycle O-Ring Custom Replacement Silicone 10 Pack #50-8095

in stock

DescriptionO-RingO-Ring for Super E & G CarburetorsSpecifications Outside Diameter: 0,510" Product Name: O-Ring Inside Diameter: 0,390" ...

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£19.35 - £19.35
£19.35
£19.35 - £19.35
£19.35

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