The latest carbon fiber technology with all the advantages of Boyesen's patented dual-stage reed design Utilizes a carbon fiber top reed and a durable fiberglass/epoxy bottom reed Offers the quickest acceleration any reed can offer; maximizes horsepower and torque Responds quickly and accurately to changes in piston speed for smooth, dependable throttle response No sacrifice in reed life like traditional carbon fiber reeds Designed for the newest 2-stroke technologies Specificatii produs COD PRODUCATOR PRO64 GREUTATE 0.0590 Kg IMPACHETARE Bucata MATERIAL Carbon Fiber MODEL PRO-64 NOTA Sold each - order one per cylinder (not one per machine) STIL Dual Stage TIP Replacement Reed Valve Petal YAMAHA YZ 250 5DJ AMERICA 1998 YAMAHA YZ 250 5DJ EUROPE 1998 YAMAHA YZ 250 4XL AMERICA 1997 YAMAHA YZ 250 4XL EUROPE 1997