S&S CYCLE 96" Sidewinder® Big Bore Stroker Kit for 1984-'99 HD® Big Twins - Wrinkle Black Finish 91-7661

An S&S 96" 3-5/8" Sidewinder big bore stroker kit is an economical route to a larger displacement engine. This kit contains nearly everying needed to take a stock 80" Harley-Davidson^® Evolution^® big twin engine up to 96" displacement. This kit includes S&S 3-5/8" bore aluminum Sidewinder cylinders and forged pistons, a 4-5/8" stroke dynamically balanced S&S flywheel assembly, complete with S&S heavy duty connecting rods and mainshafts, head gaskets, base gaskets, exhaust gaskets. Stock cases will need to be bored out to 3 5/8".

• Kits include standard flywheel assembly, 3-5/8" bore cylinders, 9.75:1 pistons, rings and gaskets
• Does not include manifold, pushrods, or pushrod clips
• Made In the U.S.A.
• Cases must be bored to accept 3-5/8" bore cylinders, and a minor crankcase clearancing operation for the crankpin nut must be performed.
• 77-89 style pinion gear and oil pump drive gears must be used when installing S&S flywheels in 90-99 engines.
  
  NOTE: Crankcases must be bored to accept larger 3-5/8" bore cylinders IMPORTANT: 1977-’89 style pinion gears, spacer, and nut are required when installing S&S flywheel assemblies. For installation in 1990-’99 or scratch built engines, order S&S Pinion Shaft Conversion Kit 33-4148 Not legal for sale or use on CA or EPA pollution controlled vehicles 1978 and later.
  

Fitment Guide

Specs