Jims Transmission Bearings

11 products — part of all Transmission Bearings

Jims transmission bearings give Harley-Davidson gearbox builders the precision rolling element bearings needed to support the mainshaft, countershaft and gear clusters within the transmission on Big Twin and Sportster models. Transmission bearings take the full rotational load of the gearbox during every gear change and at sustained road speeds — worn bearings produce a characteristic whine that changes pitch with road speed, and in advanced cases allow shaft deflection that causes gears to jump out under load. Jims supply transmission bearings to the dimensional specifications of Harley-Davidson four-speed and five-speed gearbox designs, with options covering the inner and outer mainshaft bearings, countershaft bearings and associated races that together define the running accuracy of the gearbox. Jims are recognised in the Harley-Davidson engine and transmission rebuilding community for the quality and accuracy of their precision components, making them a trusted choice for a rebuild that is expected to last. Iron City Motorcycles, an authorised Harley-Davidson dealer in Leeds, carries Jims transmission bearings alongside a comprehensive transmission rebuilding range. Browse the full Jims Transmission Bearings range below.