Boyesen Power Reed Dualstage Yamaha Yz250 03-04 4.5 Enduro KTM 350 XC-F 2013-On>

KTM 350 XC-F 2013-On>

that allowed the use of legs a lot more due to the wider wings

KTM 530 XCF-W Six Days 2009-2012

Fits internal axle hex on many late model sportbikes and some dirt bikes

Boyesen Power Reed Dualstage Yamaha Yz250 03-04 4.5 Enduro KTM 350 XC-F 2013-On>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.