Flywheel Assembly - Big Twin

Made of high-strength forged steel and designed for stock and high-performance custom applications. Special keyed 6° large diameter tapered sprocket shaft that provides more contact area for increased strength. Standard S&S tapered crankpin and pinion shaft are used for ease-of-service. 8-1/2" diameter with 4-1/4" or 4-5/8" stroke. Kits come fully assembled, trued and balanced to stock H-D 80" or 96" pistons. Include flywheel, crankpin and connecting rods. Made in the U.S.A..