Boyesen Rad Valve Yamaha Yz125 89-92 Chain Guides Packed in a convenient carry

Packed in a convenient carry box

YAMAHA YZ 04-07

200 EXC 08-09

Easy on OEM rotors

For improved core strength

Boyesen Rad Valve Yamaha Yz125 89-92 Chain Guides Packed in a convenient carryThe 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