Boyesen Power Reed Dualstage Yamaha Yz125 88-92, Tri-Z 250 85-86 Air Filter Oils & Cleaners Also improved is the fit

Also improved is the fit on the crossbrace which helps decrease movement during use

Neck-brace compatible with mounting straps

YZ250 15-20

FRONT NUMBER PLATE - WHITE OEM

Boyesen Power Reed Dualstage Yamaha Yz125 88-92, Tri-Z 250 85-86 Air Filter Oils & Cleaners Also improved is the fitOne 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.