Wiseco Piston Kit - 54.00 Mm - Yamaha Yz125 765M05400

• 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 YZ 125 (2004, 2000, 2003, 1999, 1998, 1997, 2001, 2002)