Boyesen PRO-85 Pro Series Reed For: Yamaha Blaster 1998-2006 Pro series reeds use a carbon fiber top reed coupled with a durable fiberglass or epoxy bottom reed The top carbon reed is lightweight and resilient for crisp throttle response at partial throttle or low RPMs; the stiffer, bottom reed is ported to provide maximum flow and horsepower at higher RPMs Offers a quick and accurate reaction to piston speed for smooth dependable throttle response Increases performance without sacrificing the life of the reeds