PISTON KIT 00-06 KTM250 66.40, WOSSNER 8090DC FORGED

This Wossner piston kit with a 66.42mm bore (+0.02mm oversize) is engineered for KTM SX250 models from 2000 to 2002. Made from high-strength forged material, this piston is built to perform under extreme thermal and mechanical conditions common in high-performance 2-stroke engines.

Features

• Forged piston construction for enhanced durability and load resistance

• Engineered to facilitate efficient heat transfer from combustion chamber to cylinder wall

• Elliptical design ensures consistent bearing surface during thermal expansion

• Reduces localised pressure points to prevent piston collapse

• Precision manufactured in Germany

Specifications

• Bore: 66.42 mm

• Actual piston size: 66.36 mm

• Stroke: 72.00 mm

• Display volume: 249 cm³

• Clearance: 0.06 mm

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

• Compression height: 38.00 mm

Cross-Reference OEM Part Numbers

• Piston Kit: 8090DC

• Lock: CW18

• Pin: WP033

• Ring Set: RSB6640

• Part No: 56-W774.C.WO

Vehicle Fitments

• KTM SX250 2000

• KTM SX250 2001

• KTM SX250 2002