Boyesen Power Reed Dualstage Yamaha Yz250 03-04 Old-Upload please measure across the silencer

please measure across the silencer from left to right

Comes with a microfiber goggle bag for storage and lens cleaning

it's like putting your feet inside your favorite shoes or slippers

Yamaha YZ450F 23-24

Flexible direct-inject knuckle provides lightweight protection

Boyesen Power Reed Dualstage Yamaha Yz250 03-04 Old-Upload please measure across the silencerOne 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.