WOSSNER 66.5mm PISTON KIT HONDA CR250 1984-1985, ATC250R 1984-1985

This Wossner piston kit is built for Honda CR250R and ATAC250 models from 1984 to 1985, featuring a 66.50 mm bore with an actual piston diameter of 66.44 mm. Forged in Germany, it is designed for strength and efficient thermal performance, promoting effective heat transfer from the combustion chamber to the cylinder walls. The piston’s elliptical profile ensures uniform bearing contact during thermal expansion, helping to distribute thrust loads evenly and reduce the risk of piston failure.

Features

• Forged piston for increased structural integrity

• Engineered for optimal heat transfer efficiency

• Elliptical shape reduces localised pressure under heat expansion

• Manufactured in Germany

Specifications

• Bore size: 66.50 mm

• Actual piston diameter: 66.44 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: 8156D050

• Lock Part Number: CW18

• Pin Part Number: WP033

• Ring Set Part Number: RSB6650 x2

• Alternate Part Number: 56-W526.P2.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

Majority of our listings are for a direct replacement for your original part.

Our parts are made of quality and are designed to meet or exceed the original OEM Standards.

Our products are often a cost effective alternative to genuine OEM Parts.

Please note: the models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing. Also, we cannot guarantee fitment to any non-UK models.