100447 one way bearing 150cc to 250cc This free wheel clutch plate assembly (also known as 'overtaking bypass starter', 'invading the clutch plate' and 'in a way bearing choke') applies to (but is not limited to) 150cc to 250cc air-cooled engines and is most often used for 150cc to 250cc automatic ATVs, motorcycles, buggies and / go-karts. The purpose of this component is to avoid damaging the starter when the machine is running.