Boyesen Power Reed Trial Beta Rev80 03-08, Evo80 09-21 Spacer RFX Pro Series products are

RFX Pro Series products are designed and tested with the help of top UK and International race teams

Tougher than stock chain guides

RFX Pro Res Cap Kit (Blue) Yamaha YZ125/250 08-22 YZF250 07-22 YZF450 08-22

Universal mounting

5 Enduro or 4

Boyesen Power Reed Trial Beta Rev80 03-08, Evo80 09-21 Spacer RFX Pro Series products areOne 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.