Wossner high-compression forged piston kit with a 77mm bore, designed for Kawasaki KX250F models from 2015 to 2016. Engineered for increased performance, the elliptical design ensures uniform bearing surface expansion, reducing localized pressure and preventing piston collapse. Manufactured in Germany for strength, durability, and efficient heat transfer.

Features

• High-compression design for enhanced performance


• 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: 77mm


• Clearance: 0.05mm


• Compression Ratio (Wossner): 14.50:1


• OEM Compression Ratio: 13.80:1


• Dome Volume: -1.78 cm³


• Compression Height: 19.80mm


• Stroke: 53.60mm


• Theoretical Weight: 136.00g

Cross-Reference OEM Part Numbers

• Wossner Part No.: 8922DA


• Lock Part No.: CW16


• Pin Part No.: WP087


• Ring Set Part No.: 770XAS-2


• OEM Part No.: 13001-0747


• Wiseco Part No.: 40135M07700

Vehicle Fitments

• Kawasaki KX250F (2015-2016)