The Best Performance Part for your Harley Chopper
-Assure concentricity between your mainshaft and main drive gear
-Eliminates bushing wear, and therefore mainshaft leaks
-Fits all big twin 4 speed transmission 1964 and earlier
-Choose from the original Overbearing, (for use with all OEM clutch and drive components), and Overbearing 2.0 (for use with aftermarket clutch and drive components)
-Made in USA
The Overbearing is our answer to a nearly century old problem; worn out main drive gear bushings and leaky mainshafts. The Overbearing incorporates a high strength, hardened drive gear nut with a precision ground bearing. Mating the nut and bearing together keeps your mainshaft and main drive gear concentric, eliminating bushing wear, and drastically reducing, if not altogether preventing, mainshaft leaks.
Now you can run your Harley Panhead or Knucklehead transmission with even more horsepower and less time between rebuilds!
The Overbearing 2.0 features a 3/8" bearing which is more narrow than that of the original 1/2". The additional space makes a huge difference when pairing up your aftermarket clutch basket on your custom bike build.
The Overbearing is intended for all big twin 4 speed transmissions pre-1965.**NOTE** The Overbearing is designed to work in the minimal space allowed in OEM situations. In the event aftermarket clutch baskets or aftermarket transmission sprockets are used, a minimal amount of material may need to be removed from the backside of the clutch basket to allow proper room for the Overbearing. In stock applications, the Overbearing will slightly overlap the taper on the mainshaft, but will maintain approximately .030" clearance between itself and the clutch basket.
Discover all of our Performance Chopper Parts!