Piston Kit 85-86 RM125 54.50, Wossner 8123D050 Suzuki MX

This Wossner forged piston kit features a 54.50mm bore with a +0.50 oversize specification and is intended for Suzuki RM125 models from 1985 to 1986. Manufactured in Germany, the piston is designed with an elliptical profile to provide a uniform bearing surface under thermal expansion. This reduces localised pressure and the risk of piston collapse while promoting efficient heat transfer from the combustion chamber to the cylinder walls.

Features

• Forged piston construction for high structural integrity

• Elliptical design promotes even load distribution during heat expansion

• Optimised heat transfer from combustion chamber to cylinder walls

• Made in Germany

• Includes piston, pin, locks, and ring set

Specifications

• Bore Size: 54.50mm

• Actual Bore: 54.44mm

• Stroke: 54.00mm

• Clearance: 0.06mm

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

• Compression Height: 29.50mm

• Displacement: 123 cm³

Cross-Reference OEM Part Numbers

• Piston Kit Part No: 56-W519+050.WO

• Wossner Piston PN: 8123D050

• Lock P/N: CW14

• Pin P/N: WP025

• Ring Set P/N: RSB5450 (x2)

Vehicle Fitments

• Suzuki RM125 (1985–1986)