For electric scooter, mini bike quad and Go-Kart. It may also work for bicycle. 

Specs:
- 24V DC 
- Max 500 Watt, 26.7 amps
- Max 2500 RPM
- Chain drive (11 teeth sprocket) #25H chain 
- Type of motor: DC, Brush
- Reversible
- 12 gauge leads
- Permanent Magnet

Controller:

Ted Voltage:   24Volts
Rated power:  500 watts
Under Voltage Protection: 20V±0.5V
Current Limit:28±1A
Usable Motor:  24V500 Watts  
Speed Regulator 1-4 V(Throttle )
Operating Conditions:  -25--45

 

package includes 1x motor+ 1x controller +1x throttle grips