WOSSNER 67mm PISTON KIT HONDA TRX250R 1987-1990

Wossner forged piston kit for Honda ATC250R and TRX250R models from 1987 to 1990, featuring an oversize bore of 67.00 mm (+1.00 mm). Engineered for demanding 2-stroke performance, this piston utilises a forged construction and an elliptical profile to manage heat expansion effectively. This design helps distribute thrust loads evenly and minimise stress concentrations, ensuring long-lasting engine reliability. Manufactured in Germany to exacting standards.

Features

• Forged piston for high strength and thermal resistance

• Optimised for effective heat transfer from combustion chamber to cylinder wall

• Elliptical design provides uniform expansion and prevents localised pressure

• Intended for high-performance 2-stroke engine use

• Made in Germany

Specifications

• Bore: 67.00 mm

• Actual Bore Diameter: 66.94 mm

• Compression Height: 33.00 mm

• Display Volume: 246 cm³

• Stroke: 72.00 mm

• Clearance: 0.06 mm

• Compression Ratio: 2-stroke (Wossner and OEM)

Cross-Reference OEM Part Numbers

• Piston Kit Part No.: 8189D100

• Lock P/N: CW18

• Pin P/N: WP033

• Ring Set P/N: RSB6700 (x2)

• Alternate Part No.: 56-W562.P4.WO

Vehicle Fitments

• Honda ATC250R (1987–1990)

• Honda TRX250R (1987–1990)

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.