Features: Uses Electric brushless DC motor, aluminum body, full copper coil for good heat resistance, natural air cooling, low noise, long service life. Motor Specification: High speed motor type, 72V and maximum power 3000W, rated speed 6500rpm/min, with T8F 11 tooth sprocket on the motor. Copper Core: Adopts a copper core for low noise operation and excellent speed regulating performance. Rich Content: You can get a motor, a controller, a manual, a pair of twist grips, a chain, a sprocket, a electric door lock and 2 keys in one kit of package. Application Range: Suitable for DIY kart, scooter, electric bike, ATV, motorbike, mopeds, electric SUVs, tricycles, DIY engine system. Item Type: Brushless Motor Kit Material: Aluminum + Copper Overall Weight: Approx. 7900g/17.4lb Application: For Electric Bike, Electric Scooter, Motorbike, Tricycle, DIY Engine System Product Size: Controller Box: Approx. 25x12x6.3cm/9.8×4.7×2.5in Motor Parameters: Rated Power: 3000W Rated Speed 6500RPM Twist Grip Diameter: Approx. 22.2mm/0.9in 3 Speed Selection: Low, Medium And High Speed Function Button: Forward And Reverse Button Sprocket Parameters: Sprocket: 54 Teeth Inner Diameter: Approx. 5.3cm/2.1in Diameter: Approx. 1 x Pair Of Twist Grip. 1 x Electric Door Lock. Connect all the needed accessories before connecting to the power supply. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.