Features:Most Wiseco 2-cycle pistons are forged from high-silicone bar stockGreater strength and lower expansion at high temperaturesComplete piston kits include High-Performance forged pistons, rings, wrist pins, circlips and top-end gasket kit for one complete engineAll Wiseco High-Performance pistons are priced with rings, wrist pins and circlipsWiseco ring types are not interchangeable (i.e., CD is not interchangeable with LC) and fit only Wiseco pistonsWARNING: Wiseco pistons can be fitted only with Wiseco rings.Specifications:Product Name: Rebuild KitType: Top EndPiston Material: Aluminum / ForgedBore Size: 84.00 mmBore - Oversize: +1,00 mm / +1.00 mmDisplacement: 350 ccStroke Length: 64.50 mmCompression Ratio: 10.25:1Units: EachRiding Style: ATV / Off-RoadFitment:YearMakeModel1987YamahaYFM 350 X Warrior1988YamahaYFM 350 X Warrior1989YamahaYFM 350 X Warrior1990YamahaYFM 350 X Warrior1991YamahaYFM 350 X Warrior1992YamahaYFM 350 X Warrior1993YamahaYFM 350 X Warrior1994YamahaYFM 350 X Warrior1995YamahaYFM 350 X Warrior1996YamahaYFM 350 X Warrior1997YamahaYFM 350 X Warrior1998YamahaYFM 350 X Warrior1999YamahaYFM 350 X Warrior2000YamahaYFM 350 X Warrior2001YamahaYFM 350 X Warrior2002YamahaYFM 350 X Warrior2003YamahaYFM 350 X Warrior2004YamahaYFM 350 X Warrior