PISTON KIT 94-96 YZ125 54.00 A, WOSSNER 8116DA YAMAHA MX 4JY-11631-02-A0

Wossner Piston Kit 8116DA is a standard-size forged piston specifically designed for Yamaha YZ125 models from 1994 to 1996 with a 54.00mm bore. Manufactured in Germany, this piston offers enhanced structural integrity and optimal heat dissipation. Its elliptical profile promotes an even bearing surface under thermal expansion, minimising localised stress and helping to prevent piston failure under high-performance conditions.

Features

• Forged piston for maximum strength and reliability

• Elliptical design distributes thrust loads evenly under heat expansion

• Efficient heat transfer from combustion chamber to cylinder walls

• Precision-engineered and manufactured in Germany

Specifications

• Bore: 54.00 mm

• Actual Piston Diameter: 53.94 mm

• Stroke: 54.50 mm

• Displacement: 124 cm³

• Clearance: 0.06 mm

• Compression Height: 28.00 mm

• Wossner Compression Ratio: 2-stroke

• OEM Compression Ratio: 2-stroke

Cross-Reference OEM Part Numbers

• Wossner Piston: 8116DA

• Lock: CW16

• Pin: WP036

• Ring Set: RSB5400

• Rod: P2047

• Internal Part No: 56-W647+00A.WO

• OEM: 4JY-11631-02-A0

• Alternate Part Number: 647M05400

Vehicle Fitments

• 1994 Yamaha YZ125

• 1995 Yamaha YZ125

• 1996 Yamaha YZ125