Wossner forged piston kit with a 77.01mm bore, designed for Kawasaki KX250F models from 2015 to 2016. Engineered for strength and efficient heat transfer, the elliptical design ensures uniform bearing surface expansion, reducing localized pressure and preventing piston collapse under heat expansion. Manufactured in Germany for high performance and durability.

Features

• Forged construction for increased strength and reliability


• Optimized heat transfer for efficient combustion


• Elliptical design for uniform bearing surface and even thrust load distribution


• Manufactured in Germany

Specifications

• Bore Size: 77.01mm


• Clearance: 0.05mm


• Compression Ratio (Wossner): OEM


• OEM Compression Ratio: 13.80:1


• Dome Volume: -2.43 cm³


• Compression Height: 19.80mm


• Stroke: 53.60mm


• Displacement: 249 cm³


• Theoretical Weight: 139.00g

Cross-Reference OEM Part Numbers

• Wossner Part No.: 8921DB


• Lock Part No.: CW16


• Pin Part No.: WP087


• Ring Set Part No.: 770XAS-2

Vehicle Fitments

• Kawasaki KX250F (2015-2016)