S&S, flywheel set. 4-1/2" stroke

Unassembled & unbalanced flywheel set. Flywheels have the stock 8-1/2" diameter and are compatible with the flywheel scrapers found in both stock and S&S crankcases. Compatible with S&S Sprocket shaft assemblies: - 512401 55-64 B.T. with S&S SE & SL flywheels only - 512402 65-69 B.T. with S&S SE & SL flywheels only - 512403 70-99 B.T. (excl. Twin Cam) with SE & SL flywheels only. S&S Crankpin assemblies: 512469 Std. 1.249" OD. 41-E81 B.T. Repl. 23961-41. 512471 +.001" 1.250" OD. 41-E81 B.T. 512472 +.002" 1.251" OD. 41-E81 B.T. S&S Pinion shaft assemblies: 518010 39-53 FL with OEM or S&S E flywheels. Repl. 24007-39. 512404 58-E81 B.T. (See ''Note 1'' for 54-57 models). Note sprocket shaft: OEM sprocket shafts will not fit the 6° taper that S&S flywheels have; apart from 81-85 stock style B.T sprocket shafts (OEM 23909-80 / MCS 502615 and 502616). These will fit S&S flywheels but do not have the keyway that S&S sprockets shafts have. The woodruff key eliminates spinning of the sprocket shaft in the left flywheel. Note1: 58-81 B. T. pinion shaft assemblies also fit 54-57 B.T. when the stock pressed-in bearing race is removed and the cast-in bearing retainer is bored out to accept the larger 58-81 press-in bearing race (OEM 24599-58B / MCS 518110).Note: Special Order Product only. To order please contact your MCS sales representative.