PISTON KIT 1984 YZ125 56.50, WOSSNER 8120D050 YAMAHA MX

This Wossner forged piston kit features a 56.50mm bore (56.44mm) and is specifically designed for the 1984 Yamaha YZ125. Manufactured in Germany, it offers improved structural strength and thermal performance. The piston’s elliptical design ensures an even bearing surface under heat expansion, helping to distribute thrust loads uniformly and reduce the likelihood of collapse.

Features

• Forged piston construction for enhanced durability

• Optimized for efficient heat transfer to the cylinder walls

• Elliptical design ensures uniform pressure distribution during thermal expansion

• Made in Germany

Specifications

• Bore size: 56.50mm (56.44mm)

• 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: 8120D050

• Lock: CW16

• Pin: WP036

• Ring Set: RSB5650

Vehicle Fitments

• Yamaha YZ125 1984