PISTON KIT 84-85 CR250 66.25, WOSSNER 8156D025 HONDA MX

This Wossner piston kit is designed for Honda CR250R and ATAC250 models from 1984 to 1985, featuring a 66.25 mm bore and an actual piston diameter of 66.19 mm. Forged in Germany for high strength and durability, the piston is engineered to optimise heat transfer from the combustion chamber to the cylinder walls. The elliptical design supports even load distribution under thermal expansion, reducing localised pressure and minimising the risk of piston collapse.

Features

• Forged construction for increased durability

• Engineered for efficient heat dissipation

• Elliptical profile ensures even thrust load distribution

• Manufactured in Germany

Specifications

• Bore size: 66.25 mm

• Actual piston diameter: 66.19 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: 8156D025

• Lock Part Number: CW18

• Pin Part Number: WP033

• Ring Set Part Number: RSB6625

• Alternate Part Number: 56-W526.P1.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