Kick Start Shaft Assy For Pit Bike YX 140cc 1P56FMJ Engine shaft diameter: 16mm shaft length: 200mm This part fits YX 140cc 149cc engine with engine code No.1P56FMJ and 1P56FMJ-5 This engine is commonly used on various Pit Bikes such as Stomp Demon X WPB Orion M2R MX Thumpstar Explorer Braaap Atomic Pitpro Pitster Pro DHZ SSR Piranha and other similar models Package includes: same as the product page This is a part made for the YX factory It is designed to work with the YX 140cc engine series and fits the specified models accordingly This part is suitable for replacement or repair purposes The dimensions provided include a 16mm shaft diameter and a 200mm shaft length The product is intended for use on Pit Bikes equipped with the compatible engine type Compatibility Disclaimer: This is an part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.