Featured Product
Part No. 6021, 6023 – JIMS® Milwaukee Eight® Low Profile Billet Tappet Covers & Pushrod Cover Kits
Featured Video
Part No. 5821 & 5827 – JIMS® Fork Cap Installation Tool and Fork Cap Socket
What are you looking for?
JIMS offers a variety of parts and tools specifically designed for your Harley-Davidson motorcycle. Take a look at our featured categories below, or jump right into our catalog!
What's New
At JIMS, we are constantly brainstorming new parts and tools for your Harley-Davidson. Take a look at our downloadable catalog.New at Jims
At JIMS, we are constantly brainstorming new parts and tools for your Harley-Davidson. Take a look at our downloadable catalog.Engines
We make high-Performance Twin Cam Race engines in sizes 120 inch, 131 inch, and 135 inch! See our online catalog for more info!Engines at Jims
We make high-Performance Twin Cam Race engines in sizes 120″, 131″, and 135″! See our online catalog for more info!Transmissions
We manufacture only the highest quality 5 & 6 speed transmissions, for many applications.Transmission at Jims
We manufacture only the highest quality 5 & 6 speed transmissions, for many applications.Tools
We take pride in manufacturing the highest quality specialty tools to work on Harley's. See our complete tool section in our catalog.Tools at Jims
We take pride in manufacturing the highest quality specialty tools to work on Harley’s. See our complete tool section in our catalog.Who We Are
From humble beginnings in 1967, JIMS® has grown into one of the industry leaders producing performance parts, accessories, tools, transmissions, and high-performance engines all aimed at enhancing the Harley rider’s experience. Originally, Jim Thiessen worked as a machinist with the aerospace industry. As bikes were brought to the shop in the early days for repairs and mechanical problems, customers would come to Jim looking for hard to find parts, or higher quality American made parts. In the mid to late 70’s Jim committed 100% to V-Twin Motorcycles. Developing parts & processes are his expertise, so naturally, he developed a reputation for precision machining in the motorcycle industry. Starting with just a few manual mills & lathes, JIMS now occupies several buildings totaling 50,000 square feet filled with CNC machines…