PISTON KIT 84-85 CR250 68.50, WOSSNER 8156D250 HONDA MX

This Wossner piston kit is intended for Honda CR250R and ATAC250 models from 1984 to 1985, featuring a 68.50 mm bore with an actual piston diameter of 68.44 mm. Forged in Germany, the piston is designed to deliver strength and thermal efficiency by optimising heat transfer from the combustion chamber to the cylinder walls. The elliptical design supports uniform bearing surface under expansion, minimising localised pressure and reducing the risk of piston collapse.

Features

• Forged piston construction for high durability

• Optimised for effective combustion heat dissipation

• Elliptical design evenly distributes thrust loads

• Manufactured in Germany

Specifications

• Bore size: 68.50 mm

• Actual piston diameter: 68.44 mm

• Display (cm³): 246

• Stroke: 72.00 mm

• Clearance: 0.06 mm

• Compression height: 38.00 mm

• Wossner compression ratio: 2-stroke

• OEM compression ratio: 2-stroke

Cross-Reference OEM Part Numbers

• Wossner Piston Part Number: 8156D250

• Lock Part Number: CW18

• Pin Part Number: WP033

• Ring Set Part Number: RSB6850 x2

• Alternate Part Number: 56-W526_P10.WO

Vehicle Fitments

• Honda CR250R 1984

• Honda CR250R 1985

• Honda ATAC250 1984

• Honda ATAC250 1985

• Honda ATC250R 1985

• Honda ATC250R 1986

• Honda TRX250R 1985

• Honda TRX250R 1986