Boyesen Power Reeds – Yamaha RZ350/250, RD250/350 YPVS, LC400,RZ400

Description Boyesen Power Reeds – Yamaha RZ350/250, RD250/350 YPVS, LC400,RZ400. Boyesen’s patented dual-stage design incorporates a specially shaped top reed and ported bottom reed. The top reed is lightweight and resilient for crisp throttle response at partial throttle or low RPM. The stiffer, bottom reed is ported to provide maximum flow and horsepower at higher RPM. More Airflow, More Air Velocity, More overall Power. Includes 2 sets of reeds.