WOSSNER 68.5mm FORGED PISTON KIT KTM 250 2T 1990-1994

Wossner Forged Piston Kit 68.50mm Bore – KTM GS250 / SX250 (1990–1994)
This Wossner forged piston kit is specifically engineered for KTM GS250 and SX250 models from 1990 to 1994. Featuring a 68.50 mm bore and a piston diameter of 68.44 mm (+1.00 mm oversize), it is ideal for 2-stroke engine setups requiring increased performance and structural reliability. The piston’s forged design ensures superior strength, while the elliptical geometry improves load distribution and reduces localised pressure under thermal expansion. Manufactured in Germany with precision standards.

Features

• Forged piston construction for exceptional strength and longevity

• Optimised design for effective heat dissipation to the cylinder walls

• Elliptical profile reduces stress and prevents piston collapse

• Precision-engineered and manufactured in Germany

Specifications

• Bore Size: 68.50 mm

• Piston Diameter: 68.44 mm

• Engine Displacement: 249 cm³

• Stroke: 69.50 mm

• Clearance: 0.06 mm

• Compression Height: 29.70 mm

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

Cross-Reference Wossner Part Numbers

• Piston Kit: 8005D100

• Lock: CW18

• Pin: WP033

• Ring Set: RSB6850 x 2

Vehicle Fitments

• KTM GS250 (1990–1994)

• KTM SX250 (1990–1994)

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.