SBT sells the motor on a rebuildable core exchange basis. Visit Program Description for further details.This is a Standard remanufactured Yamaha 800 engine. It includes the cases, cylinders, trued and welded Crankshaft, head, powervalves, all new internal parts & a woodruff key and a 1-year no-fault warranty.Installation Gasket Kit required.Please call SBT for shipping rates