PISTON KIT 87-90 TRX250 66.00, WOSSNER 8189DA HONDA ATV

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)