WOSSNER 66mm PISTON KIT HONDA TRX250R 1987-1990

Wossner forged piston kit for Honda ATC250R and TRX250R models from 1987 to 1990, featuring a standard bore size of 66.00 mm. This piston is engineered for high-performance 2-stroke engine applications and designed to withstand thermal and mechanical stress. Its elliptical design provides even expansion, reducing localised pressure and enhancing durability. Manufactured in Germany with high-precision standards.

Features

• Forged piston construction for enhanced strength and reliability

• Designed to improve heat transfer from combustion chamber to cylinder wall

• Elliptical profile for even bearing contact during thermal expansion

• Engineered for 2-stroke engines

• Made in Germany

Specifications

• Bore: 66.00 mm

• Actual Bore Diameter: 65.94 mm

• Compression Height: 45.00 mm

• Display Volume: 246 cm³

• Stroke: 86.00 mm

• Clearance: 0.09 mm

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

Cross-Reference OEM Part Numbers

• Piston Kit Part No.: 8189DA

• Lock P/N: CW18

• Pin P/N: WP033

• Ring Set P/N: RSB6600 (x2)

• Alternate Part No.: 56-W562.P0.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.