Wiseco Forged Series Piston Kit with Gaskets - Yamaha Grizzly 350/Raptor 350/Warrior/Big Bear (1987-2014) - 83.50mm Bore (+0.50mm Oversize) - ArmorGlide® - 4-Stroke

Wiseco Forged Series Piston Kit with Gaskets - Yamaha 350 Platform - +0.50mm Oversize

Premium Wiseco Forged Series piston kit with complete gasket set for Yamaha 350cc ATV platform including Grizzly 350, Raptor 350, Warrior 350, and Big Bear 350. This is the +0.50mm OVERSIZE (83.50mm) kit with ArmorGlide® coating!

⚠️ Oversize Piston - Cylinder Work May Be Required

This piston is +0.50mm oversize. Cylinder boring to 83.50mm may be required for proper fit.

Kit Includes

• Forged Series Piston with ArmorGlide® Skirt Coating
• Ring Set
• Wrist Pin
• Wrist Pin Retainer Set
• Complete Gasket Kit

Key Features

• Forged Series - premium 2618 aluminum alloy construction
• ArmorGlide® Skirt Coating for reduced friction
• 10.25:1 compression ratio
• Complete top-end gasket kit included
• 28 years of fitment (1987-2014)!
• Fits sport, utility, and adventure models

Piston Specifications

• Bore Size: 83.50 mm (+0.50mm Oversize)
• Piston Diameter: 83.45 mm
• Stroke Length: 64.50 mm
• Compression Ratio: 10.25:1
• Material: 2618 Aluminum Alloy
• Skirt Coating: ArmorGlide®

Engine Specifications

• Displacement: 349cc
• Engine Type: 4-Stroke
• Weight: 1.81 lbs

Fitment

• Yamaha YFM 350 Warrior: 1987-2004
• Yamaha YFM350FW Big Bear 4x4: 1989-1999
• Yamaha YFM350U Big Bear 2x4: 1996-1999
• Yamaha YFM350 Raptor: 2005-2013
• Yamaha YFM350 Grizzly 4x4 Auto: 2007-2012, 2014
• Yamaha Grizzly 350 4x4/4x2: 2007-2014
• Yamaha YFM350 Grizzly IRS 4x4 Auto: 2007-2011