PISTON KIT 1984 YZ125 56.75, WOSSNER 8120D075 YAMAHA MX

This Wossner forged piston kit with a 56.75mm bore (56.69mm) is designed for the 1984 Yamaha YZ125. Manufactured in Germany, it delivers improved strength and efficient thermal conductivity. Its elliptical design ensures a more uniform bearing surface under heat expansion, promoting even thrust load distribution and reducing the risk of piston collapse.

Features

• Forged piston for enhanced strength and durability

• Designed for optimal heat transfer from combustion to cylinder walls

• Elliptical profile provides uniform pressure distribution under thermal expansion

• Made in Germany

Specifications

• Bore size: 56.75mm (56.69mm)

• Display volume: 123 cm³

• Stroke: 50.00 mm

• Clearance: 0.06 mm

• Compression height: 30.80 mm

• Theoretical weight: Not specified

• Compression ratio: 2-stroke (Wossner and OEM)

Cross-Reference OEM Part Numbers

• Piston: 8120D075

• Lock: CW16

• Pin: WP036

• Ring Set: RSB5675

Vehicle Fitments

• Yamaha YZ125 1984