PISTON 94-09 TM250 66.4 DOMED WOSSNER 8136DA TWIN RING

Wossner forged piston kit designed for superior strength and performance in 2-stroke engines. Engineered for optimal heat transfer from the combustion chamber to cylinder walls. The elliptical design ensures uniform bearing surface under heat expansion, reducing localized pressure and distributing thrust loads evenly to prevent piston collapse. Manufactured in Germany.

Features

• Forged construction for enhanced durability
• Optimized heat transfer for improved performance
• Elliptical design prevents localized pressure and piston collapse
• Domed piston design for increased efficiency
• Two-ring configuration for improved sealing

Specifications

• Bore: 66.33 mm
• Piston Size: 66.40 mm
• Displacement: 249 cm³
• Stroke: 72.00 mm
• Clearance: 0.07 mm
• Wossner Compression Ratio: 2-stroke
• OEM Compression Ratio: 2-stroke
• Dome Volume: Domed
• Compression Height: 38.00 mm

Cross-Reference OEM Part Numbers

• Lock: CW18
• Pin: WP033
• Ring Set: 980XSY

Vehicle Fitments

• TM 250 Cross (1999-)
• TM 250 Enduro (1999-)

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.