Knucklehead left side case 1941-1947
Timken style bearing

Price: $750

This case is a faithful reproduction of the left–hand 1941-1947 Knucklehead engine case except that it has been made to take the Timken main bearing. With this case you can build your knucklehead using a ’57-’81 pre-commonized crankshaft, which uses the stronger Timken bearing. It is made from 356 aluminum alloy which has been heat treated to T6 specifications. The cylinder deck and bore, the motor mounts, and the main bearing bore are all left with .040-.060 of material so that it can be perfectly matched up to your original right hand case, which we can do for you if necessary. If you want your motor to look like it did when it originally came from Milwaukee, then this is the case for you but with the later, stronger, Timken bearing.