Engineering
Speed
Founded on passion. Built for the podium.
High-end research and development in engine and suspension systems.
From Curiosity to Championships
HP Race Development, short for Harris Performance, started with passion. What began as curiosity has evolved into a full-blown effort to provide the most powerful, most reliable engines and the best handling suspension set ups available.
We've powered top-placing privateers in professional Motocross and Supercross, and provided precision ECU tuning for some of the industry's best. We are also the last shop to successfully campaign a 250 2-stroke into a 450 main event. We approach every customer with this same championship-level standard, whether the goal is safety, speed, or a national title.
R&D Methodology
We use advanced methods to push the boundaries of what is called state of the art.
Our Services
Specialized development for Two Stroke and Four Stroke platforms.
Two Stroke
- Custom cone pipes
- Cylinder porting
- Scavenging system redesign
- Ignition systems & mapping
- Custom cylinder castings
- Head machining
Four Stroke
- Flowbench measurement
- Head porting & optimization
- Valve seats & guides
- Decking & volume changes
- Custom valves & springs
- Throttle body development
Suspension & Custom
- Suspension revalve
- Internal part design
- Trackside consultation
- Individual engine development
- EFI mapping
- Fuel system mods
World Class Suspension
Our shop is equipped with state-of-the-art tools and dynos to dial in your suspension. From basic servicing to full custom revalving, we ensure your bike handles exactly how you need it to.
Explore Services