Flywheel - 4-1/4" - Big Twin

The exact same assembly used in S&S SH80 Alternator engines. 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. Made in the U.S.A..