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Engine Parts for Classic Big Twins

Engine parts and gaskets for Harley-Davidson Classic Big Twins from 1984 and earlier, excluding Sportsters. Check each product's fitment details for the applicable models and years.

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£64.46
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James Gaskets Primary Cover Gasket & Seal Kit. Inner/Outer – 1980–1993 FLT/Touring; FXR

In stock

Description With silicone beaded 0.062" paper primary cover; derby cover and both types inspection cover gaskets. Inner primary gasket; o-rings; se...

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£64.46
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£64.46
£60.30
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£11.19 - £11.19
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£12.97
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James Gaskets Pushrod Cover Seal Kit – L79-E81 Shovelhead

Low stock

Description Includes o-ring lower; middle and upper seals. Complete kit. Fitment L79-E81 Shovelhead (NU) Product Details Brand: James Gaskets Ca...

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£11.19 - £11.19
£11.19
£12.97
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£25.70
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£25.45
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James Gaskets Rocker Cover Gasket. .031" Paper – 1966–1984 Shovelhead

Low stock

Description .031" fiber reinforced paper. Replacement reference OEM 17540-69; 17540-69A. Fitment 66-84 Shovelhead (NU) Product Details Brand: Jam...

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£25.70
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£25.45
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£54.37
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James Gaskets Cylinder Head Gasket .045" Graphite – 1984–1999 Big Twin; 1988–2022 XL…

Low stock

Description .045" graphite gasket; with Firering. Starting thickness .048"; final crush .042". Standard 3.5" bore. OEM replacement reference 16770-...

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£53.73 - £53.73
£53.73
£54.37
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£28.54
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£28.54

James Gaskets Gasket Transmission End Cover. Paper/Silicone – 1936–1986 4-Speed Big Twin

Low stock

Description .020" fiber reinforced paper with a silicone bead. OEM replacement reference 33295-36 / 2132-36. Fitment 36-86 4-speed Big Twin (NU) Pr...

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£24.58 - £24.58
£24.58
£28.54
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James Gaskets Cylinder Head 3.5" Bore .062" – 1984–1999 Big Twin; 1988–2022 XL…

Low stock

Description .062" with fire-ring and armor. Standard thickness. Starting thickness .064"; final crush .056". Incl. O-rings. OEM replacement referen...

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£81.75
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£26.57
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James Gaskets Exhaust Studs – 1984–2026 Big Twin; 1986–2022 XL…

Low stock

Description 5/16-18 to 5/16-24 X 1-11/16". Note: Exhaust studs as used in the M8 engine (OEM 10900015; 10900015A) are of a slightly different desig...

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£26.57
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£26.31
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£10.32
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£9.87
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James Gaskets Point Cover Gasket. .031" Paper – 1970–1999 Evo Big Twin; 1971–2003 XL…

Low stock

Description .031" thick paper. With 4 holes. OEM replacement reference 32591-80. Fitment 70-99 Evo Big Twin; 71-03 XL Sportster (NU) Product Detail...

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£10.32
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£10.32
£9.87
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£30.06
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£26.51
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Dynatek Single Fire Tach Adapter for Dyna-S – 1970–1999 Big Twin with Dyna-S Single…

Out of stock

Description Used to correct electronic tachometer output when using a Dyna-S single fire ignition module. Note: This adapter cannot be used with Sp...

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£30.06
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£26.51
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£14.13
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£14.13

James Gaskets CV Carburetor to Manifold Seal. Keihin – 1990–2006 Big Twin; 1988–2006 XL…

Low stock

Description OEM replacement reference 27002-89. Fitment 90-06 Big Twin; 88-06 XL Sportster. With Keihin CV carburetor (NU) Product Details Brand:...

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£10.96 - £10.96
£10.96
£14.13
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£14.13
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£33.94
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£33.61
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£33.61

James Gaskets Gasket Taillight to Lens – 1973–1999 Big Twin; XL Sportster

Low stock

Description Foam. For 73-up style taillight. OEM replacement reference 68025-73; 68027-90 Fitment 73-99 Big Twin; XL Sportster (NU) Product Details...

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£33.94
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£33.94
£33.61
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£33.61
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£18.05
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£18.05
£16.68
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£16.68

Kibblewhite Kpmi, Wrist Pin Bushings. Std – 1936–1999 Big Twin

Low stock

Description Replacement Kibblewhite Precision Machining piston pin bushings; manufactured from 100% machined SAE660 bearing bronze. Fitment 36-99 B...

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£18.05
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£18.05
£16.68
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£35.16
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£33.16
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Kibblewhite Kpmi, Exhaust Valve Guide. C630 Bronze. Std – 1984–1999 Evo Big Twin; 1999–2004 Twin…

Low stock

Description C630 bearing bronze. Size: 0.5620" O.D. (14.27mm); 0.3090" I.D. (7.85mm); 2.00" OAL (50.8mm). Comes with special shoulder for ease of i...

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£35.16
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£33.16
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£35.16
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Kibblewhite Kpmi, Intake Valve Guide. C630 Bronze. Std – 1984–1999 Evo Big Twin; 1999–2004 Twin…

Low stock

Description C630 bearing bronze. Size: 0.5620" O.D. (14.27mm); 0.3090" I.D. (7.85mm); 2.00" OAL (50.8mm). Comes with special shoulder for ease of i...

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£35.16
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£33.16
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£34.43
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£34.09
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£34.09

James Gaskets Oil Seal ''Super Nut'' – 1936–1986 4-Speed Big Twin

In stock

Description Replacement oil seal for the imported 501790 & James 501791 ''Super Nut'' style transmission mainshaft seal nuts. OEM replacement r...

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£34.43
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£34.43
£34.09
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£6.45
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James Gaskets Oil Seal, Transmission Shifter Shaft / Clutch Release – Shifter: L1979–1984 Big Twin; 1986–2005…

In stock

Description 1 used behind shifter lever on transmission. OEM replacement reference 37101-84; 37101-84A; 37101-84B. Fitment Shifter: L79-84 Big Twin...

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£5.76 - £5.76
£5.76
£6.45
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£4.86
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£4.64
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£4.64

James Gaskets O-Ring, Pushrod Cover / Dipstick / Oil Pump – Dipstick Cover; Upper (1 Used):…

Low stock

Description Pushrod middle & o-ring oil filler plug transmission. OEM replacement reference 11132; 11132A. Fitment Dipstick cover; upper (1 use...

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£4.86
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£4.64
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£44.84
£45.38
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£45.38

James Gaskets Manifold Intake Seals. Band Style – L1978–1984 Big Twin; 1979–1985 XL…

In stock

Description Used between manifold and cylinder head. OEM replacement reference 27062-78. Fitment L78-84 Big Twin; 79-85 XL Sportster (NU) Product D...

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£44.84 - £44.84
£44.84
£45.38
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£45.38
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£9.29
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£8.89
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£8.89

James Gaskets O-Ring Intake Manifold / Solenoid – Intake: 1957–1978 XL Sportster; 55-E78…

Low stock

Description Nitrile rubber. Used between the manifold and cylinder head or for the starter solenoid. OEM replacement reference 27060-55. Fitment In...

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£9.29
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£9.29
£8.89
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£8.89
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£31.18
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£31.18

MCS Lock Nuts, for Tappet Adjuster Screw – 1915–1985 All H-D

Low stock

Description 9/32"-32 threaded. Fits all tappets that take 9/32-32 threaded adjusting screws. Replaces OEM 18570-38. Note: For adjusting screws see ...

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£30.78 - £30.78
£30.78
£31.18
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£18.05
£20.94
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£20.94

James Gaskets Pushrod Cover O-Ring. Lower – 1984–2025 Big Twin; 1986–1990 XL…

Low stock

Description OEM replacement reference 11145. Fitment 84-25 Big Twin; 86-90 (NU) XL Sportster Product Details Brand: James Gaskets Category: MOTO...

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£18.05 - £18.05
£18.05
£20.94
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£20.39
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£20.39
£18.84
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£18.84

S&S Needle Bearing Camshaft. ''Full Needle'' – 1958–1999 Big Twin

Low stock

Description When still present it is advised to replace the low cost OEM needle bearing in 92-99 Evolution Big Twin models marked ''INA SCE 138 USA...

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£20.39
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£20.39
£18.84
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£18.84
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£9.25
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£8.28
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£8.28

MCS Auto-Just Rocker Arm Tension Kit – 1966–1984 Shovelhead

Low stock

Description Once installed the pressure of the wave springs will remove any excessive lateral play; keeping rocker arms in place and reducing valve...

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£9.25
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£8.28
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£28.20
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£28.20

James Gasket Inner Primary Seal #12018

In stock

DescriptionInner Primary SealMade in the USASpecificationsUnits : 5 PackApplication : Inner PrimaryType : OilStyle : 4-Speed| Double LipProduct Nam...

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£28.20 - £28.20
£28.20
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