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

This Wossner piston kit with a 66.41mm bore (+0.01mm oversize) is precision-engineered for KTM SX250 models from 2000 to 2002. Built from forged material, it provides enhanced strength, heat resistance, and consistent performance for demanding 2-stroke applications.

Features

• Forged piston ensures high strength and durability

• Designed for optimal combustion chamber heat transfer to the cylinder wall

• Elliptical profile offers consistent bearing surface during expansion

• Minimises localised stress to prevent piston collapse under high load

• Manufactured in Germany to precise engineering standards

Specifications

• Bore: 66.41 mm

• Actual piston size: 66.35 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: 8090DB

• Lock: CW18

• Pin: WP033

• Ring Set: RSB6640

• Part No: 56-W774.B.WO

Vehicle Fitments

• KTM SX250 2000

• KTM SX250 2001

• KTM SX250 2002