for 9/16" and 5/8" bore master cylinders

The new specifications are not useful in most stock engines

Note: Will not fit electric start Panhead models with the aluminum primary

like used in high performance automotive manifolds and high-end handgun bodies

Note: See 920197 for 3/4" bore master cylinder rebuild kit

Rear Hydraulic Brake Drum 1958-62 chrome B for 9/16" and 5/8" boreReproduction style brake drum. With pre installed sprocket. Replacement for OEM 41400 58C. Note: Suspension travel and even marginal out of round sprockets or brake drums, a common occurrence from day one, create a noticeable tight spot. Adjust your chain on this 'tightest spot'. Always keep sufficient play to prevent excessive wear on chain and bearings of transmission mainshaft, swingarm and wheel. Fits: > 58 62 Big Twin