OEM Grade Piston Kit Size B 96.96mm Compatible with Yamaha YZ450F 2010 2011 2012 2013 449cc Liquid-Cooled 4-Stroke DOHC 4-Valve Single-Cylinder Motocross Off-Road MX 33D-11631-00-00

APPLICATIONS: Yamaha YZ450F: · YZ450F (2010-2013) · Engine: 449cc Liquid-Cooled 4-Stroke DOHC 4-Valve Single-Cylinder · Bore x Stroke: 97.0mm x 60.8mm · Compression Ratio: 12.5:1 · Location: Top End / Cylinder Assembly · Component: Piston Kit (Size B 96.96mm) REPLACES PART NUMBERS: · Yamaha 33D-116A0-00-00 · Yamaha 33D-11631-00-00 · Pro-X 01.2440.B SPECIFICATIONS: · Type: 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 Includes: Piston Rings Wrist Pin Circlips · Material: Forged Aluminum Alloy Piston · Engine: 449cc Liquid-Cooled 4-Stroke DOHC 4-Valve Single-Cylinder · Fitment: Direct Drop-In Replacement PRODUCT DETAILS: This piston kit is a direct replacement for the Yamaha YZ450F motocross 2010-2013 with the 449cc liquid-cooled 4-stroke DOHC 4-valve single-cylinder fuel-injected engine. The 96.96mm Size B piston is designed for the standard 97mm cylinder bore providing factory-specified piston-to-wall clearance for optimal ring seal and compression in the high-performance YZ450F engine. Each kit includes forged aluminum alloy piston precision-fitted piston rings hardened wrist pin and retaining circlips for all Yamaha YZ450F 2010-2013 applications. Manufactured using premium forged aluminum alloy and precision machined on CNC equipment for consistent dimensions and reliable performance in motocross racing conditions. The 2010-2013 YZ450F features a redesigned rearward-slanting cylinder with fuel injection DOHC 4-valve head with titanium valves and five-speed transmission for competitive motocross racing. Installs directly into the standard 97mm cylinder bore for piston replacement or top-end rebuild on all 2010-2013 YZ450F motocross bikes.