S&S Cycle 96" Sidewinder Stroker Kit for Evolution Big Twin, 3.625" Big Bore, Wrinkle Black - Part #91-7661

Product type: Big Bore Kits

SKU : 0903-1258

Regular price $2,795.95 USD

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96" Sidewinder® - 3.625" Big Bore - Stroker Kit - Wrinkle Black - Evolution Big Twin Upgrade your Evolution Big Twin engine...

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96" Sidewinder® - 3.625" Big Bore - Stroker Kit - Wrinkle Black - Evolution Big Twin

Upgrade your Evolution Big Twin engine with the S&S Cycle 96" Sidewinder Stroker Kit, part number 91-7661. This comprehensive kit features a standard flywheel assembly paired with a 3.625-inch Sidewinder big bore cylinder, designed to increase your engine's displacement from the stock 80 inches to a robust 96 inches. The kit includes high-performance pistons with a 9.75:1 compression ratio, rings, and gaskets to ensure a reliable seal and optimal power output. The flywheel assembly comes complete with heavy-duty S&S connecting rods and mainshafts, contributing to enhanced durability and smooth operation. Aesthetic appeal is maintained with a wrinkle black finish, giving your motorcycle a sleek, aggressive look.

This kit is designed for easy installation with specific considerations for your engine's compatibility. The included head gaskets, base gaskets, and exhaust gaskets support a secure fit and proper sealing. Note that the kit does not include manifold, pushrods, or pushrod clips—these components must be sourced separately. When installing S&S flywheels into 1990-1999 engines, use '77-'89 style pinion gears and oil pump drive gears to ensure proper fit and function. Additionally, engine cases need to be bored to accommodate the 3.625-inch bore cylinders, and minor crankcase clearancing is required for the crankpin nut.

Made in the USA, this Stroker Kit provides a significant power boost and a custom look for your motorcycle. Proper installation requires attention to detail and some engine case modifications, but the result is a reliable, high-performance upgrade that transforms your stock engine into a more powerful, customized machine suitable for spirited riding or show. Trust S&S Cycle's quality and engineering excellence to deliver a durable, high-performance big bore upgrade for your Evolution Big Twin.

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