This Standard Bore Kit for Yamaha YZ250F 01-13 includes a cylinder, piston, and gaskets, making it a complete package for rebuilding your engine. The kit is designed for 4-stroke engines and comes with a 1-year manufacturer warranty. The item is brand new, unused, unopened, and undamaged, and is still in its original packaging. The packaging is the same as what you would find in a retail store, and there are no signs of wear and tear. This kit is perfect for those looking to rebuild their engine and restore its performance.