Electric Mountain Bike Drive Motor Conversion Kit 350W Left Chain Drive 24/36V. 350W 24V/36V Electric Conversion Kit Left Chain Drive For Common Bike Custom USA. This item is for the bike that uses the hub diameter less than 36mm. This item doesn’t include battery or charger. This is our newest kit for electric common bike, this kit mounts the sprocket on the wheel spokes, so it fits most of bicycle wheel. Motor use freewheel so when wheel rotating, the motor will not rotate, just like a normal bike, this can reduce resistance. The twist/thumb throttle kit includes. 1x brush motor with freewheel 2. 1x Customized sprocket & components 4. 1x Motor controller 5. 1x Mounting plate + bolts 6. 1x Twist throttle /thumb throttle(with battery indicator & key switch). Note: During installation, the two transmission wheels need to be adjusted to a straight line. The deviation of flywheel angle will tilt the flywheel stress point to one side, causing flywheel damage. The flywheel angle is generally adjusted through the mounting bracket of the motor.