S&S Cycle 31-0008 Generator Style Crankcase

Cast from A356 T-6 heat-treated aluminum alloy. Include crankcase bolts, washers and nuts, cylinder mounting studs, timing hole plug, magnetic drain plug, assorted breather and oil line fittings, top end oil screen spring and plug, sprocket shaft Timken bearing assembly, oil seal, pinion shaft main bearing race, cam needle bearing assembly, oil pump shaft bushings and installation instructions. Use Timken style sprocket shaft bearings and 1958 and later pinion bearings (will not accept 1957 and earlier flywheels). Bearing races are all line honed and breather cavity is precision machined to optimize breather timing for maximum oil scavenging. Machined for 3.4375in. cylinders and tapped 1/4in.-20 for gear covers, oil pump, tappet guides, timer and timer advance. 65 models use 65 alloy inner primary. Drilled for 5/16in. generator mounting bolts. 63-65 models with outside oil lines must use oil port to the rear of the tappet block or oil port in gear cover and use custom oil lines. Made in the U.S.A..

Vehicle Fitment:

1948-1950 Harley Davidson E
1948-1952 Harley Davidson EL
1948-1950 Harley Davidson F
1948-1964 Harley Davidson FL
1953-1964 Harley Davidson FLF
1958-1964 Harley Davidson FLH Duo-Glide
1955-1957 Harley Davidson FLH Hydra-Glide
1955-1964 Harley Davidson FLHF