Wiseco Piston Kit for Polaris Trail Boss 250 1987-1993 PK1085

Top-end wear is inevitable on high-mileage 2-cycle engines, but premature piston failure doesn't have to be. This Wiseco piston kit for your Polaris Trail Boss 250 delivers OEM-quality replacement parts engineered to withstand repeated combustion cycles with minimal thermal expansion, keeping your engine running efficiently whether you're trail riding or pushing harder. A complete rebuild kit means you won't be hunting down separate components—everything you need is in the box.

Wiseco's high-silicone forged construction is the industry standard for 2-cycle applications. The alloy composition reduces expansion at operating temperature, which translates to tighter ring seal and more consistent compression across your power band. Since the ring set is specifically designed to match these pistons, you get the fitment precision that separates a quality rebuild from a frustrating one.

• High-silicone forged pistons
• Fits Polaris Trail Boss 250 (1987-1993)
• Complete kit included
• Pistons, rings, wrist pins
• Circlips and gasket set
• Minimal thermal expansion
• Optimized for 2-cycle engines
• Bolt-on installation
• MPN: PK1085