Boyesen Power Reed Dualstage Yamaha Yz125 04 Peak FlexLock System: Adjustable lower boot

FlexLock System: Adjustable lower boot flex for personal preference

soft fabric for greater comfort

Use any 1/4" drive attachments such as sockets

KTM 450 XC-F 2011-2012

BONUS: includes 22mm metal locknut to replace stock cotter pin and castle nut

Boyesen Power Reed Dualstage Yamaha Yz125 04 Peak FlexLock System: Adjustable lower bootOne 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.