S&S Cycle Flywheel - 4-1/4" - Big Twin519424732 Product Description Flywheels are CNC machined from heat treated, closed die, steel forgings, and are stronger than cast iron or late style steel flywheels Replaces the original 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
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