I grew up riding and racing in the mecca of motocross, Southern California, in the 70’s. I joined the US Air Force in 1980 and after a 25 year career we started our business. I have spent over seven years on research and development (R&D); buying and trying products, modifying my personal race bikes to verify or discount manufactures claims. I only use time proven top quality parts. Since that time, I have been building and servicing customer’s machines producing fast, reliable and great handling bikes that are always in the front of the pack!
All of our
performance upgrade machining is contracted through top engine builders in California, Colorado and Utah using computer controlled precision equipment for the finest quality available. All heads are vacuum tested to ensure a better than factory seal has been achieved
. For the top level racer we also have ceramic and performance coatings to squeeze even more power out of your engine.
Suspension work is accomplished in-house using proven Race-Tech technology and use only the highest quality fluids. We cross hatch (polish) the lower fork tubes to ensure proper surface finish. In addition, we sell titanium and aluminum bolts, nuts, axles and various other parts to reduce unsprung weight, rotating mass; and to lower the center of gravity (CG) of your bike to enhance overall performance.

We offer VPR (octane 101) and U4.4 (octane 103), which are formulated for our high performance motorcycle engines; they provide lubrication and produce up to 6% more power. Pump gas is not formulated for high performance motorcycle engines and the only news from using it is bad. Inconsistency of the ethanol and petroleum mixture being delivered into the combustion chamber causes variable combustion.
In addition, buildup of carbon in the combustion chamber and exhaust ports from the use of pump gas will rob your engine of power. If you truly want top performance and reliably from your race bike you need to use race fuel.
To have a true performance machine you need to address handling, usable power output and reliably of your engine. You know, it does you no good to lead a race for 99 of 100 miles or 4 of 5 Laps just to sit on the side of the course and watch the new leader go by. We can help you select the level of performance that you can afford, so you get the best bang for your buck.
“When only the best will do”, go with Nemesis Performance!
Train, Sacrifice and Achieve,
Darren