How to Repair a Mini Bike Motor

Mini bike motors are harder to repair than normal bike motors, due to their smaller scale of size. However, they are almost identical in structure. Repairing a mini bike motor will require disassembly, diagnosis, and reassembly. You will need to have some experience in working with motors to be able to complete the diagnosis, but the disassembly and reassembly processes will be easy. The whole process will take up to a week, not including the time it takes to order replacement parts.

Instructions

1

Turn off the bike if it is not already turned off. If you just turned it off, wait 2 hours before disassembling it.

2

Read over the troubleshooting section of the manual and check out which parts may have problems. Also, look over the assembly diagram to familiarize yourself with the machine.

3

Unscrew the screws on the case with a screwdriver from the toolkit. Lift away the case and lay it on the ground. Pull the wire away from the spark plug. Locate the motor towards the front end of the bike. Unbolt the bolts on the motor and caully lift the motor towards the front of the bike and then away from the bike. Set it gently on the floor or a worktable.

4

Remove the spark plug by unscrewing and then pulling it away. Remove the bolts holding the carburetor in place. Lift the carburetor away from the rest of the motor. Remove the cylinders, pistons, and bearings by pulling them away from the motor.

5

Check all the parts for consistency with the manual. Check for broken, rusted, or irregularly shaped parts. Also, check for missing parts. Order any parts that need replacement.

6

Install the bearings, pistons, and cylinder by pushing them back into place. Match the holes on the carburetor with the poles on the motor and gently lay the carburetor down on the motor. Bolt the carburetor in place with a socket wrench from the toolkit. Install the spark plug by screwing it back into its socket with your hand.

7

Pick the motor up and match it with the poles sticking out from the frame around 2 feet behind the wheel. Stick the motor in and bolt it in place. Stick the wire socket back on to the spark plug by pushing it firmly. Screw the case back on the bike.