Boyesen Power Reed Dualstage Yamaha 4 Tops 4 Bottoms Includes Metal Plates GPX 6.5 Glossy and flexible

Glossy and flexible

Tested by top UK race teams

Seamless stitching

1i 06-11 rear

Boyesen Power Reed Dualstage Yamaha 4 Tops 4 Bottoms Includes Metal Plates GPX 6.5 Glossy and flexibleOne reed petal is NOT enough! Boyesen's revolutionary dual stage reed design delivers more usable power than stock. Stock single stage reeds operate most effectively within a relatively narrow RPM range and are limited because of the single stage design. Boyesen's one soft reed on top of one firm flow through reed gives you a wide range of intake control, plus increased intake velocity. Your original reeds can't possibly duplicate that performance.