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Pre-Evo – Engine & Gaskets

Engine components, gaskets, seals and related parts for Harley-Davidson Pre-Evolution classic models.

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Jims Beehive Valve Spring Set. 167@1.850" – 2005–2017 Twin Cam A/B; 2004–2022 XL…

Out of stock

Jims Beehive Valve Spring Set. 167@1.850" – 2005–2017 Twin Cam A/B; 2004–2022 XL… Stock style high performance one-piece Beehive spring set. Seat l...

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£29.86
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Jims Head Bolt Torque Gauge – 1984–2017 Big Twin

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Jims Head Bolt Torque Gauge – 1984–2017 Big Twin Accurate plate that helps you determine the extra 90° that is to be turned when installing the hea...

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£23.62
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Jims Nut. Pinion Shaft Gear – 1954–1989 Big Twin

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Jims Nut. Pinion Shaft Gear – 1954–1989 Big Twin 5/8-24. Left hand threaded. Repl. 24023-54. Note: Use 513750 JIMS tool for removing & installi...

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£37.37
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Jims Nut Pinion Shaft – L1981–1988 Big Twin

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Jims Nut Pinion Shaft – L1981–1988 Big Twin 3/4-20 threaded. On flywheel side. Repl. 24016-80. Fitment L81-88 Big Twin (NU) Product Details Brand...

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Jims Pinion/Sprocket Shaft Nut – Pinion Shaft: 30-E81 Big Twin. Sprocket…

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Jims Pinion/Sprocket Shaft Nut – Pinion Shaft: 30-E81 Big Twin. Sprocket… 3/4-18 threaded. Used on flywheel side. Repl. 24023-36. Fitment Pinion sh...

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£75.22
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JIMS Crankpin Nut. 54-E81 XL – 54-E81 XL Sportster

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JIMS Crankpin Nut. 54-E81 XL – 54-E81 XL Sportster 1"-20 threaded. Repl. 23967-54A. Fitment 54-E81 XL Sportster (NU) Product Details Brand: Jims ...

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£55.78
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Jims Crankpin Nuts – 1941–1953 Big Twin

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Jims Crankpin Nuts – 1941–1953 Big Twin 7/8"-18 threaded. Repl. 23967-41 (366-41). Fitment 41-53 Big Twin (Excl. Flatheads) (NU) Product Details ...

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Jims Steel Breather Valve. +.030" – 48-E77 Big Twin

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Jims Steel Breather Valve. +.030" – 48-E77 Big Twin +.030" oversized breather is used to save worn or damaged crankcases. Manufactured from aerospa...

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Jims 53-84 Tappet. Standard .731" O.D – 1953–1965 Panhead; 1966–1984 Shovelhead

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Jims 53-84 Tappet. Standard .731" O.D – 1953–1965 Panhead; 1966–1984 Shovelhead OEM style replacement tappet lifter only; without the hydraulic uni...

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£165.35
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£146.99
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Jims Hydrosolid Tappet. Standard .8425" O.D – 1984–1999 Evo Big Twin; 1986–1990…

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Jims Hydrosolid Tappet. Standard .8425" O.D – 1984–1999 Evo Big Twin; 1986–1990… Must be used with adjustable pushrods. Jims ''Hydrosolid'' tappets...

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£165.35
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£174.92
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Jims Powerglide Hydraulic Tappet. Standard .731" O.D – 1953–1984 Big Twin

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Jims Powerglide Hydraulic Tappet. Standard .731" O.D – 1953–1984 Big Twin The hydraulics used will work with both hydraulic and solid style camshaf...

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£174.92
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Jims Upper Valve Spring Collars. Titanium – 1984–2004 Big Twin; Twin Cam B…

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Jims Upper Valve Spring Collars. Titanium – 1984–2004 Big Twin; Twin Cam B… Compatible with 1.437" - 1.500" spring diameter. 10° angled for OEM H-D...

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£447.95
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Jims Evo B.T. Pro-Lite Worksavers Aluminum Pushrod Set – 1984–1999 Evo Big Twin

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Jims Evo B.T. Pro-Lite Worksavers Aluminum Pushrod Set – 1984–1999 Evo Big Twin Quick installs without removing rocker covers. Manufactured from bl...

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£447.95
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£379.60
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Shovelhead ''Slim JIMS'' Aluminum Adj. Pushrod Set – 1966–1984 Shovelhead with OEM Style…

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Shovelhead ''Slim JIMS'' Aluminum Adj. Pushrod Set – 1966–1984 Shovelhead with OEM Style… For models with OEM style hydraulic units only for use wi...

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£183.10
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Jims Pushrod Cover Spacer Set. .155" Thick – 1936–2025 Big Twin; 1957–1990 XL…

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Jims Pushrod Cover Spacer Set. .155" Thick – 1936–2025 Big Twin; 1957–1990 XL… Used to space-out stock length pushrod covers when longer than stock...

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Jims Pushrod Cover Spacer Set. .275" Thick – 1936–2025 Big Twin; 1957–1990 XL…

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Jims Pushrod Cover Spacer Set. .275" Thick – 1936–2025 Big Twin; 1957–1990 XL… Used to space-out stock length pushrod covers when longer than stock...

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Jims Valve Spring Kit, Race. Titanium .675" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin…

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Jims Valve Spring Kit, Race. Titanium .675" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin… Race valve spring set. Titanium top collars. Kits includ...

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Jims Valve Spring Kit. Titanium .600" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin…

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Jims Valve Spring Kit. Titanium .600" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin… Street & Performance. Titanium top collars. Kits include t...

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£47.05
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Jims Pinion Shaft Bushing. +.005" – 1936–1953 Big Twin

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Jims Pinion Shaft Bushing. +.005" – 1936–1953 Big Twin Bronze. O.D. 1.0020". Used in cam cover. Oversized replacement for standard sized OEM 25582-...

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£46.39
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£925.70
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£796.08
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Jims ''A Cut Above'' Billet Cam Cover L73-92 B.T. Polished – L1973–1992 Big Twin

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Jims ''A Cut Above'' Billet Cam Cover L73-92 B.T. Polished – L1973–1992 Big Twin Hidden mount screws; billet 7075-T651 aluminum and exact positioni...

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£925.70
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£796.08
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£61.25
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Gardner-Westcott Rocker Box Top Bolt Kit. Flanged Hex, Chrome – 1999–2017 Twin Cam

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Gardner-Westcott Rocker Box Top Bolt Kit. Flanged Hex, Chrome – 1999–2017 Twin Cam Chrome. Flanged domed hex head bolts. Includes washers. Fitment ...

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£61.25
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Colony High-torque – 1936–1984 Big Twin

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Colony High-torque – 1936–1984 Big Twin Black oxide; no washers; provides extra space for big bore cilinders but fits stock bore cylinders equally ...

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£30.85
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£30.47
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£18.18
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MCS Sprocket Shaft Bearing Spacer Shim .098" – 1969–2002 Big Twin; Twin Cam B

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MCS Sprocket Shaft Bearing Spacer Shim .098" – 1969–2002 Big Twin; Twin Cam B Used to set correct pre-load onto sprocket shaft bearings. Approx. di...

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£17.31
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MCS Sprocket Shaft Bearing Spacer Shim .094" – 1969–2002 Big Twin; Twin Cam B

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MCS Sprocket Shaft Bearing Spacer Shim .094" – 1969–2002 Big Twin; Twin Cam B Used to set correct pre-load onto sprocket shaft bearings. Approx. di...

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