BOYESEN PRO-189 BOYESEN REEDS, Boyesen Pro Series Reeds - PRO, PRO-189 Full Exhaust System Vertex pistons can be run

Vertex pistons can be run at tighter tolerances compared with forged pistons

Air-Gap™ ventilation system with Ram Air

Direct replacement for 45mm SHOWA fork bushings

2020 - 2026 YAMAHA YZ 250 FX

Crafted for both comfort and style

BOYESEN PRO-189 BOYESEN REEDS, Boyesen Pro Series Reeds - PRO, PRO-189 Full Exhaust System Vertex pistons can be runBoyesen Pro Series Reeds PRO 189 Carbon fiber top reed and a durable fiberglass epoxy bottom reed Features the quickest acceleration any reed can offer while maximizing horsepower and torque Quick and precise response to changes in piston speed delivers smooth, dependable throttle response You wont sacrifice reed life as you might with traditional carbon fiber reeds Created for the newest 2 stroke technologies Suzuki 2003 Suzuki RM250 Part No. 05 P189