Boyesen Rad Valve Yamaha Yz125 89-92 Sierra By increasing the flow

By increasing the flow

Time saving method maintains crank shaft true during installation

powered by MIPS®

250 EXC 20-23

498 RR 11-12

Boyesen Rad Valve Yamaha Yz125 89-92 Sierra By increasing the flowThe 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