OEM PART NUMBERS:
• Yamaha Piston 1mm Over (current): 1UY-11638-01-00 / 1UY116380100
• Yamaha Piston 1mm Over (earlier): 1UY-11638-00-00 / 1UY116380000
• Yamaha Piston 1mm Over (newer models): 5UH-11638-00-00 / 5UH116380000
• Yamaha Piston 1mm Over (early alt): 1YW-11638-01-00 / 1YW116380100
• Yamaha Piston Ring Set: 4GB-11610-00-00 / 4GB116100000
• Yamaha Piston Pin: 55V-11633-00-00 / 55V116330000
• Yamaha Circlip: 93450-19095-00 / 934501909500
• Yamaha Standard Piston (newer ref): 5UH-11631-00-C0
• Yamaha Standard Piston (earlier ref): 1UY-11631-01-Y0 / 1YW-11631-01-Y0
SPECIFICATIONS:
• Type: Piston Kit (Piston, Rings, Wrist Pin, Clips)
• Bore Size: 1mm Over Size
• Outside Diameter: 84mm (+1mm / +0.040")
• Standard Bore Reference: 83mm
• Engine Type (350cc models): 348cc 4-Stroke SOHC Air-Cooled Single-Cyl 83mm × 64.5mm 9.2:1
• Engine Type (400cc models): 386cc 4-Stroke SOHC Air/Oil-Cooled Single-Cyl 83mm × 71.5mm 8.6:1
• Condition: New
APPLICATIONS:
• Yamaha Big Bear 350 YFM350FW 348cc SOHC (1987-1999)
• Yamaha Warrior 350 YFM350X 348cc SOHC (1987-2004)
• Yamaha Moto-4 350 YFM350ER 348cc SOHC (1987-1995)
• Yamaha Kodiak 400 YFM400FW 386cc SOHC (1993-1999)
• Yamaha Wolverine 350 YFM350FX 348cc SOHC (1995-2009)
• Yamaha Bruin 350 YFM350 348cc SOHC (2004-2006)
• Yamaha Raptor 350 YFM350R 348cc SOHC (2004-2013)
• Yamaha Grizzly 350 YFM350G 348cc SOHC (2007-2014)
• Yamaha Big Bear 400 YFM400 386cc SOHC (2000-2012)
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
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