Available July 2021
The venerable YZ 250 is a natural product for a BRC 500cc kit. Paying homage to the mid-90's Yamaha, BRC's YZM500 is bringing that dream to the public.
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PERFORMANCEExplosive motocross power delivery. 499cc of powerful performance. 60+ HP, 50+ Ft Lbs torque. Tailored for all out motocross.
POWER VALVESimple, pneumatic power valve system for linear, smooth power delivery. For added bottom end performance, we have engineered a triple blade power valve.
TRANSMISSIONAccepts your donor Yamaha transmission and the YZ250X transmission.
STARTINGKick-start compatible. Every engine comes with a decomp button to make kick-starting this big bore easier.
FITMENTFits the 05-21 aluminum frames with no fabrication. 99-04 steel frames require minor modification.
EXHAUSTEvery kit comes with a purpose-built pipe and silencer to fit your bike.
VIBRATIONSBad vibrations are canceled out with our integral counterbalance shaft.
CARBURATIONContrary to popular belief, your stock carburetor is the best fit for this package.
This was BRC’s first foray into a 500cc conversion kit, which became globally accepted with success.
Following the success of our original kit, it was a natural development for BRC to make a 500cc engine kit for the current KTM motorcycles.
The venerable YZ 250 is a natural product for a BRC 500cc kit. Paying homage to the mid-’90s (works) Yamaha YZM500 BRC is bringing that dream to the public.
BRC is in the process of designing a twin-cylinder 140+ horsepower 2T engine kit for Yamaha R6 motorcycles.