This 24 volt 100 watt MY6812 motor with 9 tooth #25 chain sprocket is compatible with the Razor E100, E125, E150, E175, eSpark, and Trikke. This is also the motor used on the Dynacraft Hello Kitty SU E-Scooter as well as the Pulse Charger, EM-1000, Reverb, and Revster electric scooters. This motor is for chain-drive models of the Razor E100/E125 (versions 5+) and all versions of the Razor E150, E175, and eSpark. Also compatible with the Pulse Reverb and Revster scooters. This motor will not work on belt-drive versions of the Razor E100/E125. Note: Unlike many electric scooter parts, the 100 watt MY6812 electric motor works equally well as part of a 12 volt system as it does in a 24 volt electric system. In addition, this motor is capable of rotation in either the clockwise or counterclockwise direction by reversing the motor's power wires. Manufacturer: Unite Motor Co. Model: MY6812B Voltage: 24 volts DC Output: 100 watts Sprocket: 9 tooth #25 chain sprocket Case Length: 3-15/16" (100 mm) Case Diameter: 2-11/16" (68 mm) Drive Shaft Length: 1-1/8" (28 mm) Drive Shaft Diameter: 5/16" (8 mm) Mounting Hole Distance: 1-9/16" (40 mm) Compatibility: Dynacraft Hello Kitty SU E Pulse EM-1000 Pulse Reverb Pulse Revster Razor E100 & E125 Razor E150 Razor E175 Razor eSpark Razor Launch Razor Trikke E2