Boyesen Power Reed Dualstage Yamaha Rd350Lc, Rd500, Rzv500R Lights & Switches Bike Grip:

Bike Grip:

​· Yamaha WR450F 2006

250 EXC-F 17-19

· Sherco 250SEF-R / 300SEF-R / 450SEF-R 2019

Boyesen Power Reed Dualstage Yamaha Rd350Lc, Rd500, Rzv500R Lights & Switches Bike Grip:One 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.