SRM Stainless Gearbox Sprocket Nut with Oil Seal – BSA Pre-Unit

Stainless Steel Gearbox Sprocket Nut with Built in Oil Seal, complete with tab washer (24-4263)

Hexagon Head

Suitable for BSA Pre-Unit Swinging Arm Models:

• BSA B31/B32/B33/B34 & DB32/DBD34 Goldstar 1954-63
• BSA A7/A10/ Rocket Goldstar up to 1963

Replaces 67-3053

Manufacturer's Description

Do you have a BSA pre-unit single or BSA A7 and A10 ? Tired of having an annoying pool of oil forming under your clutch side when you leave the bike on the side stand ? We have the answer !

BSA fitted a gearbox oil seal for the sprocket but did not consider sealing off the gearbox mainshaft where it protrudes through the sleeve gear bush, even with a perfect fit here, oil will leak out.

Our Stainless steel nut has an oil seal fitted so it seals on the gearbox mainshaft, and the bonus is that the nut has a full "Hex" so you can get a socket tool on to torque it up correctly, an improvement on the slotted BSA  standard nut.