Heavy Duty Racing

MX-Tech Huck valve

Need bottoming resistance? MX-Tech Huck valve is the only way to fly.

more info

Custom WP reservoir removal tools

Check out our HDR custom WP reservoir removal tools

The gang at Glen Helen

The MX-Tech 250 build dream team

MX-Tech project Honda

I built the engine for made the cover of MXA. March issue of MXA will be out any day now.

HDR Machined Tools

HDR machines tools in-house. Each tool is precision cut for a perfect fit each time.

About Us

Heavy Duty racing has been in business since 1991 specializing in suspension and engine modifications for all disciplines or riding.

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MXT CR250 PROJECT BIKE

Check out the March issue of Motocross Action magazine. Click the: MXA – We Ride link to read the article. The MXT CR250 project bike is an awesome example of how top brands in the industry come together to make something great. Don’t forget to subscribe to MXA, and be sure to support the companies […]