R/D Spring Corp started in 1981, by Donn & Pat Rickard and Jim & Barbara Dour, after the demise of S & W Engineered Products. R/D Spring Corp is now a family owned and operated business, with Donn’s wife Pat, daughter Sandra McLaughlin and grandson Zach Jones. We are located in Hesperia California.
Donn started building race engines at the age of 16, when he purchased his first Harley Davidson. C.B. Klausen of C.B. Stroker, stroked Donn’s Harley to 68". At the age of 17, Donn met Shell Thuet, who helped Donn with many projects. At Rosamond drylake the Indian Scout with Donn’s high school buddy Frank Lee riding @ 131 lbs, ran 101 mph, and the Harley with Donn riding @ 181 lbs ran 105.8 mph. Donn also ran both bikes at places like, The Divide in South Los Angeles.
R/D Spring, uses the best quality material, such as 6AL4V titanium AMS 4928Q, 4140 Cr Mo, Al Si Bronze, 7075 T-6 Aluminum are some examples. Donn’s main desire is to make engines run right and to their full potential. Donn has engineered and designed R/D’s products to his specifications. Donn’s grandson Zach Jones also assists Donn in the engineering of new products and in cylinder head set up.
We offer flow work and custom cylinder head work by appointment. R/D Spring, also offers cylinder head restorations on bikes and cars, as well a full line of Ferrea Valves.