“4-1/4in. Stroke Flywheel Assembly. Fits Evolution Big Twin 1984-1999.” has been added to your cart. View cart

Showing 37–48 of 56 results

Pinion Shaft Nut. Fits Big Twin 1990-1992.
$59
* 5/8in.-24 left-hand threads* Sold each* Made in the U.S.A.* Replaces OEM # 24022-90

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Pinion Gear Nut. Fits Big Twin 1954-1989.
$94
Features & Benefits:-* 5/8-24 UNEF-3B LH x .375in.* Black Steel – 4140* Replaces OEM # 24023-54Proudly Made in the USA by S&S Cycle !Tech Tips: * Use this tool for an easy install # JM-94555-55A

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Stock Motor Case Stud, Bolt & Nut Kit – Chrome. Fits Shovel 1970-1978.
$105
Features & Benefits:-* Packaged for this Specific Application.* Custom Look.* Chrome Plated Stock Style. Proudly Made in the USA by Colony Machine !

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Crank Pin Key. Fits Big Twin 1941-Early 1981.
$40
* Use on Big Twin Late 1941- Early 1981.* Made in the U.S.A.* Sold as a Pack (10).* Replaces OEM # 23985-18

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4-5/8in. 89ci Stroker Flywheel Assembly. Fits Evolution Big Twin 1984-1999.
$3,009
S&S has been making stock bore stroker kits since the early 1960s. Theyre still popular today due to the excellent power gains for the money, as well as the easy installation. Stock bore strokers reuse the stock cylinders and crankcase, so the kits are economical to buy.Features & Benefits:-* 89ci Using this 4/5/8in. flywheel &…

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4-1/4in. Stroke Flywheel Assembly. Fits Evolution Big Twin 1984-1999.
$2,753
Features & Benefits:-* Stock Replacement.* 1990-1999 models require purchase of pinion shaft conversion kit # SS33-4148.Proudly Made in the USA by S&S Cycle !

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4-1/4in. Stroke Flywheel Assembly. Fits 80ci Big Twins from 1973-1984.
$3,273
Features & Benefits:-* Can also be used to upgrade your 1200cc Engine 1973-1980 to 1340cc/80ci Engine.Tech Tips:-* Upgrading your 1200cc Engine 1973-1980 to 80ci/1340cc Engine requires the purchase of a 3-1/2in. Bore Cylinder & Piston Kit # SS91-9023 & 1340cc/80ci Shovel cylinder base studs # CM-8857-8* The 1340cc/80ci Cylinder base studs are slightly longer to…

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Crankcase Assembly with 3-1/2in. Bore – Black. Fits Big Twin 1984-1991.
$3,141
Features & Benefits:-* Wrinkle Black.* Perfect for stock replacement & high performance applications* These crankcases offer some unique features. * Besides being machined for a crank position sensor, they are also compatible with stock flywheel assemblies, primary covers, gearcovers and are clearanced for 38 amp alternator stators.* Relocated cam chest oil pick-up increases gear case…

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Alternator Style Crankcase Assembly with Stock Bore – Natural. Fits Big Twin 1970-1984.
$2,839
Features & Benefits:-* The S&S Super Stock alternator style crankcases are perfect for stock replacement & for high performance applications. * Pre-clearanced for strokes up to & including 5in. S&S Super Stock crankcases are compatible with stock 1970-1999 flywheel assemblies, primary covers, gearcovers & clearanced for 38 amp alternator stators. Tech Tips:-* Stock Bore #…

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Crankpin Nut. Fits Big Twin Late 1981-1999.
$28
Features & Benefits:-* Sold Each.* Replaces OEM # 23969-83Tech Tips:-Two Normally Required.Proudly Made in the USA by S&S Cycle !

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Connecting Rods. Fits Big Twin Late 1981 – Early 1983.
$522
Features & Benefits:-* Meets or exceeds OEM specifications* Come completely fitted and ready to install* Complete set includes a two-hole crankpin, aluminum retainers, bearings, nuts and forged heat-treated steel rods* Replaces OEM # 24281-80B

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Heavy Duty Connecting Rods. Fits Evo 1984-1999
$1,044
Features & Benefits:-* 7.440in. Rod Length.* Sold as a Pair.Tech Tips:-* Torque crankpin nuts to H-D specs 180-210 ft/lbs for both OEM & S&S forged flywheels. * Greater torque will result in damaged crankpin threads. * If conrod sideplay is excessive do not exceed 250 ft/lbs on the S&S flywheels , for oem use factory…

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Restore and maintain your classic motorcycle with our specialised range of crankcase and bottom-end components for models from 1936 to 1999. At Taverner Motorsports, we offer premium products from renowned brands like S&S, Standard Motorcycle Parts, Jims, and Bender Cycle, ensuring top-notch quality and performance.

Our selection includes high-quality crankcases, bearings, and connecting rods specifically designed to fit vintage motorcycle models. Each component is crafted to match or exceed original specifications, providing reliable performance and long-term durability.

Whether you're working on a restoration project or need replacement parts for maintenance, our detailed product descriptions and fitment guides will help you find the perfect components for your motorcycle—trust Taverner Motorsports for all your classic motorcycle crankcase and bottom-end needs.