SBT sells the motor on a core exchange basis. Visit Program Description for further details.This is a standard remanufactured Yamaha FX HO engine. It includes the cases, crankshaft, head assembly, all new internal parts.To determine the correct SBT application, you must know the size of the earth plate (big or small) and if there is a breather hole on the valve cover. Please call SBT for shipping rates At this time the item you are selecting is sold on a cores first basis, please refer to our Program Description on sending the correct components to SBT. The lead time average for turn around is approximately 5-10 business days. Once SBT receives the core, this core has entered the remanufacturing process and cannot be returned.