CROSS REFERENCE PART NUMBERS:
• Yamaha 1UY-11638-01-00 (1mm Oversize)
• Yamaha 5UH-11638-00-00 (1mm Oversize)
• Pro-X 01.2487.100
ITEM SPECIFICATIONS:
• Component: Piston Kit (1mm Oversize)
• Piston Size: 84mm (1mm Over Standard 83.0mm)
• Standard Bore x Stroke: 83.0mm x 64.5mm
• Displacement: 348cc
• Compression Ratio: 9.2:1
• Kit Contents: Piston, Ring, Wrist Pin, Circlips
• Material: Forged Aluminum Alloy Piston
• Engine: 348cc Air-Cooled 4-Stroke SOHC 2-Valve Single-Cylinder
• Model Years: 1987-2014 (Various Yamaha 350 ATV)
COMPATIBLE MODELS:
Yamaha 350cc ATV Models:
• Warrior 350 YFM350X (1987-2004)
• Raptor 350 YFM350R (2005-2013)
• Bruin 350 YFM350BA (2004-2006)
• Grizzly 350 YFM350G (2007-2014)
• Wolverine 350 YFM350FX (1995-2009)
PRODUCT DETAILS:
Replacement 1mm oversize piston kit designed for the Yamaha 348cc air-cooled SOHC engine used across the Warrior 350, Raptor 350, Grizzly 350, Wolverine 350, and Bruin 350 ATV models. The 84mm oversize bore piston maintains proper clearance for optimal ring seal and compression in the bored cylinder during rebuilds of the durable Yamaha 350 engine. Includes forged aluminum alloy piston, precision-fitted piston ring, hardened wrist pin, and retaining circlips for a complete oversize piston replacement on all compatible models. Built from premium forged aluminum alloy and CNC machined for consistent dimensions and dependable operation in demanding ATV conditions. Requires cylinder bored to 84mm for use during top-end rebuilds when the standard bore has been worn beyond service limits on Yamaha 350cc ATV models.
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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