Boyesen 603 Dual-Stage Fiberglass Power Reeds

Boyesen 603 Power Reeds feature a dual-stage fiberglass reed design. The lightweight upper reed is designed for partial-throttle and low-RPM response, while the stiffer ported lower reed is designed for increased airflow at higher RPM. Compatible applications include select Honda, Suzuki, and Yamaha motorcycles and ATVs listed below.