PISTON KIT 1984 YZ125 57.50, WOSSNER 8120D150 YAMAHA MX

This Wossner forged piston kit with a 57.50mm bore (57.44mm) is designed for the 1984 Yamaha YZ125. Engineered and manufactured in Germany, it provides increased durability and optimized thermal performance. The elliptical design ensures an even bearing surface during piston expansion, effectively distributing thrust loads and minimizing the risk of piston collapse.

Features

• Forged construction for enhanced mechanical strength

• Engineered for efficient heat transfer to cylinder walls

• Elliptical profile provides uniform load distribution under thermal expansion

• Made in Germany

Specifications

• Bore size: 57.50mm (57.44mm)

• 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: 8120D150

• Lock: CW16

• Pin: WP036

• Ring Set: RSB5750

Vehicle Fitments

• Yamaha YZ125 1984