Boyesen Power Reed Dualstage Yamaha 4 Tops 4 Bottoms Includes Metal Plates Plastics attractive

attractive

Maximum twist 170 degrees / maximum travel 58 mm

pipe to silencer sleeve

meaning they last longer and give better performance than any other reed available

Boyesen Power Reed Dualstage Yamaha 4 Tops 4 Bottoms Includes Metal Plates Plastics attractiveOne 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.