The Wossner 92mm Bore Piston Kit (Part No. 8691DA) is a high-performance forged piston designed for Polaris 500 Explorer, ATP 500 H.O, and Sportsman models from 1996 to 2005. Engineered for strength and durability, it optimizes heat transfer within the combustion chamber and features an elliptical design to ensure even load distribution, reducing localized pressure and preventing piston collapse. Manufactured in Germany, this piston maintains the OEM compression ratio for reliable engine performance.

Features

• High-strength forged piston construction


• Optimized heat transfer for improved combustion efficiency


• Elliptical design for even thrust load distribution


• Manufactured in Germany

Specifications

• Bore Size: 92mm


• Actual Bore Diameter: 91.95mm


• Compression Ratio: OEM


• OEM Compression Ratio: 10.20:1


• Displacement: 498cc


• Stroke: 75.00mm


• Clearance: 0.05mm


• Dome Volume: -9.20cm³


• Compression Height: 33.30mm

Cross-Reference OEM Part Numbers

• Lock P/N: CW23


• Pin P/N: WP024


• Ring Set P/N: 920XSY


• OEM Part Numbers: 3087170, 4677M09200

Vehicle Fitments

• Polaris 500 Explorer (1996-2005)


• Polaris ATP 500 H.O (1996-2005)


• Polaris Sportsman (1996-2005)