CROSS REFERENCE PART NUMBERS:
• Yamaha 1SL-116A0-00-00
• Yamaha 1SL-11631-00-00
• Yamaha BR9-116A0-00-00
• Yamaha BR9-11631-00-00
• Yamaha B2W-116A0-00-00
• Yamaha BHR-116A0-00-00
• Pro-X 01.2444.B
ITEM SPECIFICATIONS:
• Component: Piston Kit (Size B, Standard Bore)
• Piston Size: 96.96mm (Size B)
• Bore x Stroke: 97.0mm x 60.8mm
• 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 4-Valve Single-Cylinder
• Model Years: 2014-2025 (YZ450F), 2016-2025 (WR450F/YZ450FX)
COMPATIBLE MODELS:
Yamaha YZ450F / WR450F / YZ450FX:
• YZ450F (2014-2025)
• WR450F (2016-2025)
• YZ450FX (2016-2025)
• YZ450F Monster Energy Yamaha Racing Edition (2021-2023, 2025)
PRODUCT DETAILS:
Direct replacement piston kit engineered for the Yamaha YZ450F, WR450F, and YZ450FX 449cc liquid-cooled 4-stroke DOHC 4-valve fuel-injected engine with a 97mm standard bore. The Size B piston at 96.96mm provides factory-specified clearance within the standard 97mm cylinder bore for optimal ring seal and power delivery across the full RPM range. Kit comes complete with forged aluminum alloy piston, precision-fitted rings, hardened wrist pin, and retaining circlips for a comprehensive top-end rebuild. Precision machined on CNC equipment using premium forged aluminum alloy for reliable sealing and consistent power delivery in motocross racing and enduro riding conditions. This piston kit ensures proper fit and dependable performance for all YZ450F 2014-2025, WR450F 2016-2025, and YZ450FX 2016-2025 applications.
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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