Established in 1967 by Jim Thiessen, JIMS® Machining (JIMS®) has been manufacturing precision performance products for use on ... Harley-Davidson® motorcycles for over 45 years now! Our mission has always been to set the standard for American made precision products and tools for use on V-Twin engines. Now, with approx. 50,000 square feet of CNC machines, we are larger than ever and growing every day! read more