New Piston Kit Size A 76.95Mm Compatible With Yamaha Yz250f 2001-2007 Wr250f 2001-2013 Gas Gas Ec-F

CROSS REFERENCE PART NUMBERS:
• Yamaha 5NL-11631-00-00
• Yamaha 5NL-11631-10-00
• Yamaha 5NL-11631-20-00
• Pro-X 01.2406.A

ITEM SPECIFICATIONS:
• Component: Piston Kit (Size A, Standard Bore)
• Piston Size: 76.95mm (Size A)
• Bore x Stroke: 77.0mm x 53.6mm
• Displacement: 249cc
• Compression Ratio: 12.5:1
• Kit Contents: Piston, Rings, Wrist Pin, Circlips
• Material: Forged Aluminum Alloy Piston
• Engine: 249cc Liquid-Cooled 4-Stroke DOHC 5-Valve Single-Cylinder
• Model Years: 2001-2007 (YZ250F), 2001-2013 (WR250F), 2010-2015 (EC-F 250)

COMPATIBLE MODELS:
Yamaha YZ250F / WR250F / Gas Gas EC-F 250:
• Yamaha YZ250F (2001-2007)
• Yamaha WR250F (2001-2013)
• Gas Gas EC-F 250 (2010-2015)

PRODUCT DETAILS:
Direct replacement piston kit engineered for the Yamaha YZ250F 249cc liquid-cooled 4-stroke DOHC motocross bike 2001-2007 and the WR250F enduro 2001-2013 sharing the same 77mm cylinder bore with the Gas Gas EC-F 250. The Size A piston at 76.95mm provides factory-specified piston-to-wall clearance within the standard 77mm cylinder bore for optimal ring seal and 4-stroke performance across the full RPM range. Kit comes complete with forged aluminum alloy piston, precision-fitted piston rings, hardened wrist pin, and retaining circlips for a comprehensive top-end rebuild on the Yamaha YZ250F WR250F and Gas Gas EC-F 250. Precision machined on CNC equipment using premium forged aluminum alloy for reliable sealing and consistent power delivery in motocross and enduro racing conditions. The YZ250F and WR250F feature DOHC engines with titanium valves and five-speed transmission for competitive motocross and enduro racing. This piston kit ensures proper fit and dependable performance for all 2001-2007 YZ250F, 2001-2013 WR250F, and 2010-2015 Gas Gas EC-F 250 bikes.

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