PISTON KIT 90-91 KX250 68.50, WOSSNER 8109D110 KAWASAKI MX

Wossner Forged Piston Kit 68.50mm Bore – Kawasaki KX250 / KDX250 (1990–1994)
This Wossner forged piston kit is made for Kawasaki KX250 and KDX250 models produced between 1990 and 1994. With a bore size of 68.50 mm and a piston diameter of 68.44 mm (+1.10 mm oversize), it is designed for overbored or re-sleeved cylinders. The piston’s forged construction ensures enhanced durability, while its elliptical shape promotes even pressure distribution under thermal expansion. Precision-manufactured in Germany for high-performance reliability.

Features

• Forged piston for maximum strength and extended durability

• Optimised combustion heat transfer to maintain cylinder integrity

• Elliptical geometry provides consistent load distribution and minimises piston wear

• Manufactured in Germany for precision and consistency

Specifications

• Bore Size: 68.50 mm

• Piston Diameter: 68.44 mm

• Engine Displacement: 250 cm³

• Stroke: 70.00 mm

• Clearance: 0.06 mm

• Compression Height: 37.00 mm

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

Cross-Reference Wossner Part Numbers

• Piston Kit: 8109D110

• Lock: CW18

• Pin: WP033

• Ring Set: RSB6850

• Rod: P2022

Vehicle Fitments

• 1990 Kawasaki KX250

• 1991 Kawasaki KX250

• 1991 Kawasaki KDX250

• 1992 Kawasaki KDX250

• 1993 Kawasaki KDX250

• 1994 Kawasaki KDX250