WSM 010-831-04K Polaris Piston Kit Oversize - 650 0.25mm

The WSM 010-831-04K is a complete piston kit designed for Polaris 650 engines requiring a 0.25mm oversize bore. This comprehensive kit includes everything needed for a piston replacement: piston, rings, wrist pin, circlips, and needle bearing.

Platinum Series Features:

• Constructed from high-strength hardened aluminum alloy engineered to prevent skirt and ring groove breakage under extreme operating conditions
• Piston walls feature a specialized non-abrasive coating that reduces heat buildup and friction, delivering increased horsepower and significantly extending service life
• Manufactured to exact OEM specifications for precise fit and reliable performance
• Includes pre-gapped piston rings for simplified installation
• Complete with all necessary hardware including wrist pin, circlips, and needle bearing

Ideal for engine rebuilds, performance upgrades, or replacement of worn pistons in Polaris 650 two-stroke snowmobile and watercraft engines. The 0.25mm oversize allows for cylinder boring to restore proper piston-to-wall clearance in worn cylinders.