MOTORCYCLE RAD VALVE 59-7211M 80 Hz to 20 kHz

80 Hz to 20 kHz Frequency Response and 89dB Sensitivity

Replacement piston for the Roost Havoc 50cc Cylinder kit

Stroke: Original (39 mm)

2000 Honda XR70R

1991 Yamaha YFS200 Blaster

MOTORCYCLE RAD VALVE 59-7211M 80 Hz to 20 kHzBOYESEN engineers embarked on a mission to create a new lineage of aerodynamic intake technology by refining the primary performance factors required to increase peak horsepower through design innovation: Aerodynamic Surface Optimization, Model Specific Reed Petal Tensioning, Material Fuel Resistance, and Multi Stage Reed Timing. Together, these innovations create a new technological benchmark in intake performance. Boyesen Engineering would like to