For over
15 years our focus has been performance products and Big Bore Kits for the Motorcycle, ATV and Off-Road Industry.
Since our humble beginnings, Thumper has grown into an organization that helps, educates and provides reliable performance solutions to thousands of motorcycle enthusiasts nationally as well as overseas.

Thumper Racing is a full service performance shop for all your off-road racing, trail riding and MX needs.

From the most advanced motor modifications to general maintenance we have what it takes to get your bike to perform exactly how you want. Bring your bike in or just send us the motor or suspension and we willl do the rest.

Thumper Racing ONLINE. With established, long term relationships with major industry distributors such as Parts Unlimited, Tucker Rocky, Western Power Sports and MTA we can get you what you want at discounted prices quickly. Gear, performance parts and casual wear can be shipped to almost anywhere in the world.


Call: 661.424.1800
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