Yamaha 7KA-11631-00-A0 Engine Piston Assembly

Description:

The Yamaha 7KA-11631-00-A0 Piston Assembly is a combustion component used in motorcycle engine cylinder systems. Commonly installed in Yamaha off-road and motocross engines to compress the air-fuel mixture and transfer combustion force to the crankshaft. Maintenance teams and engine technicians use this part for repair, rebuild, and performance restoration of worn piston assemblies.

Applications:

The Yamaha 7KA-11631-00-A0 Piston Assembly is used in Yamaha engine systems where efficient combustion and compression are critical for performance and durability. It is commonly found in Yamaha off-road motorcycles and motocross bikes, operating within the cylinder bore to convert combustion pressure into mechanical motion. This component is essential during engine rebuilds and maintenance cycles to restore compression, reduce blow-by, and maintain consistent engine output.

Technical Specifications:

• Brand: Yamaha
• Part Number: 7KA-11631-00-A0
• Product Type: Piston assembly
• Function: Compresses air-fuel mixture and transfers combustion force
• Application: Motorcycle engine cylinder and crankshaft system
• Fitment: Yamaha off-road motorcycles (model-specific compatibility required)
• Material: Cast or forged aluminum alloy for high heat resistance
• Mounting Location: Cylinder bore within engine block
• System Role: Converts combustion energy into mechanical motion
• Configuration: Includes piston body (rings, pin, clips typically sold separately or in kit)
• OEM Status: Genuine Yamaha replacement component

Common Replacements:

• Yamaha 7KA-11631-10-A0
• Yamaha 5NY-11631-00-A0
• Yamaha 3BN-11631-00-00