Wiseco Piston Kit - 47.50 Mm - Yamaha Pw80/Bw80 649M04750

• Forged from high-silicon aluminum alloy for maximum strength and dependability • Wiseco offers a complete range of popular piston models and years for both trail and racing applications • Durability, longevity and increased horsepower • Innovative forging design and piston skirt provide maximum horsepower and torque • Features forged pistons, rings, wrist pins, and circlips • These high-tech piston designs offer maximum compression ratios, ultra-stiff strutted forgings, and titanium nitride-coated rings, which all add up to more power that is sustained longer • Each piston is E-Coated on the crown, ring grooves, and pin bore, for maximum wear resistance and protection from micro-welding, galling, and detonation • GP Series parts generally have less machining on the outside, which helps seal up the bore for increased compression • Additionally, boost ports are removed for a more predictable powerband and increased pull on the top end • Cylinder sleeves must be purchased separately. • Service intervals may be increased with Racer's Choice pistons over conventional Wiseco pistons, and are for expert racers and tuners only. - Yamaha PW 80 (1992, 1996, 2004, 2006, 1998, 1999, 2001, 1986, 1994, 1995, 2000, 2002, 1984, 1988, 1990, 2003, 1983, 1993, 1997, 1985, 2005, 1987, 1989, 1991); Yamaha Big Wheel 80 (1989, 1987, 1990, 1986, 1988)