S&S, unassembled crankshaft. 3-31/32" stroke

Unassembled and unbalanced flywheel assembly. The flywheels have the original 8-1/2" diameter and are compatible with the flywheel scrapers present in the original and S&S crankcases.
Compatible with S&S pinion shaft assemblies:
- 512403 70-99 B.T. (excl. Twin Cam) only with SE and SL flywheels.
S&S axle assemblies:
- 512473 Std. 1.249" OD. L81-99 B.T (excl. Twin Cam). Repl. 23961-80A - 512474 +.001" 1.250" OD. L81-99 B.T (excl. Twin Cam). Repl. 23974-87 - 512476 +.002" 1.251" OD. L81-99 B.T (excl. Twin Cam). Repl. 23975-87 - 512478 +.003" 1.252" OD. L81-99 B.T (excl. Twin Cam).
S&S sprocket shaft assemblies:
- 512406 L81-99 B.T. (excl. Twin Cam). STD. Repl. 24006-80, 24006-83 & 24006-87. (See 'Note 2' for 90-99 models) Note 2: OEM Evo Big Twin 90-99 models fitted with the original one-piece flywheel/axle design must use the S&S Evo Big Twin 90-99 pinion shaft conversion kit (MCS 904148).
Note on pinion shaft: OEM pinion shafts do not fit the 6° taper of S&S flywheels, except stock-style B.T. 81-85 pinion shafts (OEM 23909-80 / MCS 502615 and 502616). These fit S&S flywheels but do not have the keyway groove found on S&S pinion shafts. The Woodruff key prevents the pinion shaft from rotating in the left flywheel.
Note: Product available on special order only.
To order, contact your MCS sales representative.


Specifications


Brand
S&S


Application
81-99 Big Twin (excl. Twin Cam (NU)


OEM
23961-80A, 23974-87, 23975-87, 24006-80, 24006-83, 24006-87, 23909-80


Packaging weight
0 kg


HS Code
87141090


Motorcycle family
BIG TWIN, DYNA, FX, FXR, SOFTAIL, TOURING


Original name
S&S, unassembled flywheel set. 3-31/32" stroke