clutch and transmission are combined and use the same oil

Size = Wrench size

for no good reason

Allen head kits for the engine

39-83 Big Twin & 45" SV

arlen ness stage 1 big sucker round air cleaner for harley BS90 clutch and transmission are combinedOne piece aluminum backing plate For use with the OEM round air cleaner cover Stage 1 red pre oiled filter element. With added urethane for best support of the factory cover. The best and simplest performance air cleaner kit for your bike period. Increases Horsepower & Torque Patented Hidden Breather Technology Pre Oiled & Synthetic High Performance Filters One Piece Aluminum Backing Plate Radius Air Inlet for Unobstructed Airflow Note: See 960971 for