FITS ALL 2003 TO 2013 YZ250F MODELS! 77mm CP JE or Wiseco forged piston. Hotrods HD crank with rod.This is a bolt on kit and the piston uses pump or race gas. We STRONGLY recommend that this be installed by a qualified mechanic with experience doing this type of work. The item "03-13 YZ250F YZF250 YZ 250F Motor Engine Rebuild Kit Complete Top Bottom End" is in sale since Friday, April 14, 2017. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Big Bore & Top End Kits". The seller is "bpracingatv" and is located in Upland, California. This item can be shipped worldwide.