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

This Wossner piston kit features a 66.40mm bore in standard size, designed for KTM SX250 models from 2000 to 2002. Manufactured with forged construction, it delivers exceptional strength and heat management tailored to high-performance 2-stroke engines.

Features

• Forged piston construction offers superior strength and durability

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

• Elliptical design maintains a consistent bearing surface under thermal expansion

• Distributes thrust loads evenly to minimise localised stress and prevent piston collapse

• Made in Germany with high-precision manufacturing

Specifications

• Bore: 66.40 mm

• Actual piston size: 66.34 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: 8090DA

• Lock: CW18

• Pin: WP033

• Ring Set: RSB6640

• Part No: 56-W774.A.WO

• 774M06640

Vehicle Fitments

• KTM SX250 2000

• KTM SX250 2001

• KTM SX250 2002