Boyesen Rad Valve Yamaha Yz250 97-98 Bike Rigid design increases torsional strength

Rigid design increases torsional strength

Lab tests show this built in feature helps fight the force of gravity and circulate blood back to the heart more efficiently

Oversized Velcro strap

Cycra designed in USA with top factory racers

Boyesen Rad Valve Yamaha Yz250 97-98 Bike Rigid design increases torsional strengthThe Boyesen Rad Valve features a sophisticated array of performance attributes designed to provide peak horsepower gains, durability, and model specific performance for each make model year machine. Each Boyesen RAD Valve is unique tailor made to that model, year and displacement. With the new RC2 Rad Valve System, Boyesen engineers have created a lineage of aerodynamic intake technology by refining the primary performance factors required to increase