S&S CYCLE EVOLUTION 4.25" STROKER FLYWHEEL ASSEMBLY HARLEY DAVIDSON harley handlebars Works with most stock tail

Works with most stock tail lights and blinker assemblies (verify that you have 13" between your shocks and blinkers)

System equals 5 steps throughout for EXTREME POWER gains

18 mm O2 Bungs with 12 mm adapters

GEL SEATING - NO BACKREST

Includes sprockets

S&S CYCLE EVOLUTION 4.25" STROKER FLYWHEEL ASSEMBLY HARLEY DAVIDSON harley handlebars Works with most stock tailS&S CYCLE EVOLUTION 4. 25" STROKER FLYWHEEL ASSEMBLY 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"