Thumb throttle for electric scooters. This electric scooter throttle has four wires, check below for functionality of each wire. Throttle wire measures 60". This throttle can also be used as a replacement for 3 wire thumb throttles. In a three wire application the yellow wire (battery level indicator) will not be used. Compatible with some, but not all, Razor scooter products. Prior to ordering, make sure your controller's four throttle wires are red, black, green, and yellow. Also measure your controller's four wire throttle connector and verify you have 4.5 - 6.0 volts between the red and black wire. If you do not read this level of voltage this throttle is not compatible, or your controller needs to be replaced. Note: The manufacturer has produced several cosmetic variations of this very simple but effective throttle design. Although all are functionally identical, the throttle you receive may or may not look identical to the photo above. Throttle Wire Color to Controller Wire Color (Description) Red to Red (4.5 - 6.0 Volts Power) Black to Black (Ground) Green to Green or Blue (Speed Signal) Yellow to Yellow (Optional Battery Level Indicator)
