4 VALVES CYLINDER HEAD PWK21 2007 - TRX400EX Sportrax

2007 - TRX400EX Sportrax

300 RPM with 200 RPM increments plus a setting to disable the rev limiter

HEAT MASTER can be installed on different scooter models

4 – STROKES: Twin Air PowerFlow kit for 4-Stroke models: Replace your air-restricting stock backfire screen with our New PowerFlow kit

4 VALVES CYLINDER HEAD PWK21 2007 - TRX400EX SportraxThe Koso 4V Head Kit is the ideal engine part to complete the Koso Honda Grom Big Bore kit. Because of its unique 4 valve design, the air flow and performance are increased. This new designed head is the perfect addition for those who desire more power and torque. Not legal for use in California on pollution controlled vehicles, race use only in California waiver available. Requires the use of Iridium spark plug The 4 Valve Head Kit features a forged