Boyesen Power Reed Dualstage Yamaha Dt250 78-79, Dt400 77-78, Ty250 74-77+84 & 88, Ty350 85-86 Engine Service KTM 150 SX 2013-On>

KTM 150 SX 2013-On>

KTM 400 XCF-W Six Days 2001-2002

RFX Factory Kit KTM EXC250 14-19 EXC250/300 TPI 18-22 EXCF250/350/450 14-22

200 XC 06-09

Perfect combination of durable

Boyesen Power Reed Dualstage Yamaha Dt250 78-79, Dt400 77-78, Ty250 74-77+84 & 88, Ty350 85-86 Engine Service KTM 150 SX 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.