New Piston Kit Size B 94.96Mm Compatible With Yamaha Yz450f 2003-2009 Wr450f 2003-2015 Gas Gas Ec-F

CROSS REFERENCE PART NUMBERS:
• Yamaha 5TJ-11631-00-00
• Yamaha 5TA-11631-00-00
• Yamaha 2S2-11631-10-00
• Yamaha 2S2-11631-20-00
• Yamaha 1DX-11631-00-00
• Pro-X 01.2429.B

ITEM SPECIFICATIONS:
• Component: Piston Kit (Size B, Standard Bore)
• Piston Size: 94.96mm (Size B)
• Bore x Stroke: 95.0mm x 63.4mm
• Displacement: 449cc
• Compression Ratio: 12.5:1
• Kit Contents: Piston, Rings, Wrist Pin, Circlips
• Material: Forged Aluminum Alloy Piston
• Engine: 449cc Liquid-Cooled 4-Stroke DOHC 5-Valve Single-Cylinder
• Model Years: 2003-2009 (YZ450F), 2003-2015 (WR450F), 2013-2015 (EC-F 450)

COMPATIBLE MODELS:
Yamaha YZ450F / WR450F / Gas Gas EC-F 450:
• Yamaha YZ450F (2003-2009)
• Yamaha WR450F (2003-2015)
• Gas Gas EC-F 450 (2013-2015)

PRODUCT DETAILS:
Direct replacement piston kit engineered for the Yamaha YZ450F 2003-2009, WR450F 2003-2015, and Gas Gas EC-F 450 2013-2015 with the 449cc liquid-cooled 4-stroke DOHC 5-valve engine. The Size B piston at 94.96mm provides factory-specified piston-to-wall clearance within the standard 95mm 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 top-end rebuild on the Yamaha YZ450F WR450F and Gas Gas EC-F 450. Precision machined on CNC equipment using premium forged aluminum alloy for reliable sealing and consistent power delivery in motocross and enduro racing conditions. The YZ450F and WR450F 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 2003-2009 YZ450F, 2003-2015 WR450F, and 2013-2015 Gas Gas EC-F 450 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