Boyesen Rad Valve Honda Cr250 05-07 Youth UFO Chain Guide (Neutral) Yamaha

UFO Chain Guide (Neutral) Yamaha YZ125 89-92

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The geometry of the boot ankle mechanism has also been modified they explain to allow the boot to better copy ankle movement

Unique expansion mechanism ensures seal is pulled straight and will not damage engine cases during extraction

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Boyesen Rad Valve Honda Cr250 05-07 Youth UFO Chain Guide (Neutral) YamahaThe 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