Flywheel Assembly

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Flywheel - 4-1/4" - Big Twin Flywheels are CNC machined from heat-treated, closed die, steel forgings, and are stronger than cast iron or late style steel flywheels Replaces the or iginal flywheels in S&S® 80" SH80 engines with alternator style crankcases for '70-'84 Big Twin Can be used to overhaul an S&S engine or to build a custom engine using similar crankcases and pistons Features 4-1/4" stroke, 8-1/2" diameter flywheels, and 7.440" connecting rods May also be used in 88" engines with 3-5/8" bore cylinders Made in the USA Show more