Throttle Potentiometer with Mounting Bracket for the Golden Companion I & II (GC221, GC321, & GC421) (MBE-C21-POT-MB) Amigo Battery Chargers Hammerhead Off-Road® uses this size

Hammerhead Off-Road® uses this size as the rear shock on their MudHead® go-kart

Throttle cable for Arctic Cat snowmobiles

crown nuts

and a half-moon Woodruff key

Throttle Potentiometer with Mounting Bracket for the Golden Companion I & II (GC221, GC321, & GC421) (MBE-C21-POT-MB) Amigo Battery Chargers Hammerhead Off-Road® uses this sizeIf you have a 1st generation companion scooter, this throttle potentiometer with mounting bracket for the Golden Companion I & II (GC221, GC321, & GC421) may be what you need to get your scooter running smoothly. Also known as a throttle pot, this potentiometer mounts on your scooter's dashboard console. Faulty throttle potentiometers can lead to "jerky" motion while throttling, or no motion at all. Note that this unit is only for the older versions