JIMS Inner Primary Bearing and Seal Tool for 1985-2020 Harley-Davidson Big Twin Models 729

Installing inner primary seals and bearings on your Big Twin requires precision—one slip with a conventional press risks damaging critical components and compromising your primary drive system. The JIMS 729 tool delivers controlled, even pressure exactly where you need it, eliminating guesswork and protecting your investment in quality parts. This is the kind of specialized tool that separates professional results from costly mistakes.

Whether you're rebuilding a primary from the ground up or replacing worn seals, the 729 streamlines the process without tying up your shop press or requiring improvised solutions that invite damage. Its lightweight, straightforward design means both seasoned Harley technicians and committed DIY builders can execute the job with confidence and repeatability.

• Fits 1985–2020 Big Twin
• Precision seal installation
• Bearing installation tool
• Controlled pressure application
• No press required
• Compact design
• Lightweight construction
• U.S.A. manufactured
• Bolt-on simplicity
• Professional-grade durability