Boyesen Power Reed Dualstage Yamaha Yz250 97-98 Exhaust guards Curved spade for the big

Curved spade for the big stuff

Kawasaki KXF 250/450 09-16 4 stroke EFI models Kawasaki tool 57001-1471

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Boyesen Power Reed Dualstage Yamaha Yz250 97-98 Exhaust guards Curved spade for the bigOne 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.