Piston Kit 0.25Mm Over Compatible With 1987-2004 Yamaha Warrior 350 Yfm350x Big Bear 350 Moto-4 350

OEM CROSS-REFERENCE PART NUMBERS:
• 1UY-11631-01-Y0 (piston standard)
• 1YW-11631-01-Y0 (piston standard, alt ref)
• 5UH-11631-00-C0 (piston standard, later models)
• 1UY-11636-01-00 (piston 0.50mm OS)
• 1YW-11636-01-00 (piston 0.50mm OS)
• 1UY-11638-01-00 (piston 1.00mm OS)
• 1YW-11638-01-00 (piston 1.00mm OS)
• 4GB-11610-00-00 (ring set)
• 55V-11633-00-00 (piston pin)
• 93450-19095-00 (circlip)

SPECIFICATIONS:
• Bore Size: 83.25mm
• Oversize: 0.25mm Over
• Standard Bore: 83mm
• Displacement: 348cc
• Bore x Stroke: 83mm x 64.5mm
• Engine: 4-Stroke SOHC Air-Cooled Single Cylinder
• Compression: 9.2:1
• Material: Aluminum Alloy
• Kit Contents: Piston, Rings, Wrist Pin, Circlips

COMPATIBILITY:
• 1987-2004 Yamaha Warrior 350 YFM350X
• 1987-1999 Yamaha Big Bear 350 YFM350FW
• 1987-1995 Yamaha Moto-4 350 YFM350ER
• 1995-2009 Yamaha Wolverine 350 YFM350FX
• 2004-2013 Yamaha Raptor 350 YFM350R
• 2004-2006 Yamaha Bruin 350
• 2007-2014 Yamaha Grizzly 350
PRODUCT NOTICE:
As a parts distributor we mostly sell aftermarket parts (any OEM parts would be noted as such). Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but are designed to function the same as - if not better than - the original. All parts sold are new.WARNING - This product may expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
YAMAHA 350 ATV APPLICATIONS (1987-2014):

YAMAHA BIG BEAR 350:
• Yamaha YFM350FW Big Bear 350 4x4 (1987-1999)
• Yamaha YFM350U Big Bear 350 2WD (1996-1999)
• Yamaha YFM350FH Big Bear 350 Hunter Edition (1999)
• Yamaha YFM350FWBM Big Bear 350 SE (1997)

YAMAHA WARRIOR 350:
• Yamaha YFM350X Warrior 350 (1987-2004)

YAMAHA MOTO-4 350:
• Yamaha YFM350ER Moto-4 350 (1987-1995)

YAMAHA WOLVERINE 350:
• Yamaha YFM350FX Wolverine 350 4x4 (1995-2005)
• Yamaha Wolverine 350 2WD (2006-2009)

YAMAHA RAPTOR 350:
• Yamaha YFM350R Raptor 350 (2004-2013)

YAMAHA BRUIN 350:
• Yamaha YFM350BA Bruin 350 2WD (2004-2006)
• Yamaha YFM350FA Bruin 350 4x4 (2004-2006)

YAMAHA GRIZZLY 350:
• Yamaha YFM350G Grizzly 350 2WD (2007-2012)
• Yamaha YFM350FG Grizzly 350 4x4 (2007-2014)
• Yamaha Grizzly 350 IRS (2007-2011)
• Yamaha Grizzly 350 Hunter Edition (2007-2014)

YAMAHA BIG WHEEL 350:
• Yamaha BW350 Big Wheel 350 (1987-1988)

ENGINE SPECIFICATIONS:
• 348cc 4-Stroke SOHC Air-Cooled Single Cylinder
• 83mm Bore x 64.5mm Stroke
• Compression Ratio: 9.2:1
• 2-Valve SOHC

NOTES:
• Same 348cc engine platform across all listed models
• Kit includes piston, rings, wrist pin, and circlips
• Verify OEM part number before ordering