motor138Motorized Pulley 138LS, with machined helical gear box, performs an efficiency, in a compact diameter of 138 mm only. With a min RL of 300 mm and powers ranging from 0.10 to 0.75kWMotor138 QSJ138J-90 Liquid Cooled 138 V3 4000W 90H Mid Drive Motor with Gearbox and Better Temperature Resistance, for 120kph electric scooter.