INNER PRIMARY HIGH TORQUE BEARING KIT

This kit repalces the  legacy type main shaft race, needle bearing and bearing seal.
Harley part #34091-85 inner bearing race has been used on Big Twins since 1985.
The inner primary bearing rides on this race and, by design, this race press-fits onto the transmission mainshaft.
While this system has worked fine over the years for the lower powered Harley stock engines. 100+ horsepower engines can make this race shift on the mainshaft. If it shifts inboard it will damage the maindrive gear seal and cause a transmission oil leak. If it shifts outboard, it will cause a primary oil leak. This high torque bearing kit eliminates this possible issue.