PISTON KIT 90-91 KX250 67.40 B, WOSSNER 8109DB KAWASAKI MX

Wossner Forged Piston Kit 67.41mm Bore – Kawasaki KX250 / KDX250 (1990–1994)
This Wossner forged piston kit is designed for Kawasaki KX250 and KDX250 models manufactured between 1990 and 1994. Featuring a 67.41 mm bore and a piston diameter of 67.35 mm (+0.01 mm oversize), it offers excellent mechanical strength and thermal stability. Forged in Germany, the piston incorporates an elliptical design that promotes even load distribution and minimises the risk of localised pressure build-up under heat expansion.

Features

• Forged construction for superior strength and extended service life

• Optimised for efficient combustion chamber heat dissipation

• Elliptical geometry provides uniform thrust load distribution and reduces wear

• Precision-manufactured in Germany

Specifications

• Bore Size: 67.41 mm

• Piston Diameter: 67.35 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: 8109DB

• Lock: CW18

• Pin: WP033

• Ring Set: RSB6740 x 2

• Rod: P2022

Vehicle Fitments

• 1990 Kawasaki KX250

• 1991 Kawasaki KX250

• 1991 Kawasaki KDX250

• 1992 Kawasaki KDX250

• 1993 Kawasaki KDX250

• 1994 Kawasaki KDX250