This 2-bolt rear motor mount for K models and Sportster is made from high tensile cast aluminum and reinforced in all areas tending to crack. This provides superior stability and weight reduction. The bracket slips over the starter shaft and studs of the motor housing. Unlike original brackets, this one has a recess in the upper area, which allows the mounting on completely assembled engines. 4-bolt models (1952-1966) may need some case grinding.