Boyesen Power Reed Dualstage Polaris 90Cc Helmet Bag Indexing letters on movable anvil

Indexing letters on movable anvil and body ensures correct tool configuration

Bike Make Model Year(s) Yamaha YZF 450 10-13

FC 250 14-15

SE-F 450 14-23

250 X-TRAINER 20-23

Boyesen Power Reed Dualstage Polaris 90Cc Helmet Bag Indexing letters on movable anvilOne 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.