This is a new, top quality, Namura piston and rings kit for ALL year models from 1985-1986 Polaris 250 Scrambler. Don't waste your time rebuilding your motor with cheap quality, inferior parts. Build it right the first time with this top quality kit. Namura piston and rings kits feature smooth piston heads for better fuel efficiency, hard anodized crowns making them 75% stronger than non-anodized pistons, a MOS2 Teflon/Molydbenum coating giving them high durability and lubricity, and they are made to exact OEM specifications. This comes in a variety of sizes, so please select your size carefully.  If you simply need replacement rings, we offer these as well in our other listings. Also, since you're rebuilding your top end, you'll need the gaskets, which we offer. Keep in mind, if your cylinder needs machining, we offer complete machine work as well---check out our services.