PISTON KIT 84-85 CR250 66.75, WOSSNER 8156D075 HONDA MX

This Wossner piston kit is designed for Honda CR250R and ATAC250 models from 1984 to 1985, featuring a 66.75 mm bore and an actual piston diameter of 66.69 mm. Forged in Germany, it is built for high strength and optimised thermal efficiency, allowing effective heat transfer from the combustion chamber to the cylinder walls. Its elliptical design ensures uniform bearing surface during thermal expansion, reducing localised pressure and helping to prevent piston collapse.

Features

• Forged construction for enhanced durability

• Engineered for efficient heat dissipation

• Elliptical profile promotes even thrust load distribution

• Manufactured in Germany

Specifications

• Bore size: 66.75 mm

• Actual piston diameter: 66.69 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: 8156D075

• Lock Part Number: CW18

• Pin Part Number: WP033

• Ring Set Part Number: RSB6675 x2

• Alternate Part Number: 56-W526.P3.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