PISTON KIT 90-94 KTM250 67.50, WOSSNER 8005DB FORGED

Wossner Forged Piston Kit 67.51mm Bore – KTM GS250 / SX250 (1990–1994)
This Wossner forged piston kit is made for KTM GS250 and SX250 models from 1990 to 1994. With a bore size of 67.51 mm and a piston diameter of 67.45 mm (+0.01 mm oversize), it is suited for 2-stroke engine applications requiring high strength and optimal thermal efficiency. The forged construction and elliptical design ensure even thrust load distribution, minimising wear and stress under expansion. Manufactured in Germany to precise engineering standards.

Features

• Forged piston design for superior durability and performance

• Enhanced heat transfer for combustion chamber cooling

• Elliptical geometry provides even load distribution and reduced localised pressure

• Manufactured in Germany

Specifications

• Bore Size: 67.51 mm

• Piston Diameter: 67.45 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: 8005DB

• Lock: CW18

• Pin: WP033

• Ring Set: RSB6750 x 2

Vehicle Fitments

• KTM GS250 (1990–1994)

• KTM SX250 (1990–1994)