PISTON KIT 84-85 CR250 69.00, WOSSNER 8156D300 HONDA MX

This Wossner piston kit is designed for Honda CR250R and ATAC250 models from 1984 to 1985, featuring a 69.00 mm bore with an actual piston diameter of 68.94 mm. Manufactured in Germany, the forged piston provides high strength and efficient heat transfer from the combustion chamber to the cylinder walls. Its elliptical shape ensures a uniform bearing surface under thermal expansion, distributing thrust loads evenly and reducing localised stress to help prevent piston collapse.

Features

• Forged construction for high durability

• Designed to optimise combustion chamber heat dissipation

• Elliptical profile supports even load distribution

• Manufactured in Germany

Specifications

• Bore size: 69.00 mm

• Actual piston diameter: 68.94 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: 8156D300

• Lock Part Number: CW18

• Pin Part Number: WP033

• Ring Set Part Number: RSB6900 x2

• Alternate Part Number: 56-W526_P12.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