How to fix an electric choke on a 50 CC scooter

Written by david machado
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How to fix an electric choke on a 50 CC scooter
Using a series of mechanical and electrical devices is common in many vehicles. (lathe image by Andrey Kiselev from

Repairs to systems that operate using electrical relays and mechanical linkage require the repair person to understand both electrical circuits and physical connections. Knowing the proper electrical and mechanical tools to use will also be needed. With a little trial and error and some basic testing skills, the average mechanic should be able to complete the repairs needed to restore proper operation of an electrical choke in a fairly short period of time.

Skill level:

Things you need

  • Safety glasses
  • Volt-ohm meter
  • Wrench kit
  • Needle-nose pliers
  • Snub-nose pliers
  • Short wire (about 16 inches) with alligator clips on each end
  • Lightweight grease or lubricant

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  1. 1

    Put on the safety gasses. Using the volt ohm meter, test the battery by connecting the positive lead from the volt-ohm meter to the positive battery terminal and the negative volt-ohm meter lead to the negative battery terminal. Make sure the read out is 12 volts.

  2. 2

    Identify the choke button. Find the two terminals on it with wires connected to them. Clip one end of the short wire with the alligator clips on either terminal. Touch the other end of the wire with the alligator clips to the other terminal while watching the choke linkage.

  3. 3

    Replace the choke button with a new one if the choke linkage operated properly. At the device---the solenoid---that controls the choke linkage, find the two wires connected to it and trace them to their source if the choke linkage did not operate properly. Check the one with an inline fuse on it and verify the fuse is good. Replace the fuse if necessary.

  4. 4

    Check the ground connection on the other wire. Unplug it from the ground terminal and clean the spade connection. Plug it back on, making sure it provides a good connection to the frame. Replace any parts too rusted or dirty to clean. Replace the wire if visibly worn.

  5. 5

    Push the choke button while watching the choke linkage to see if it operates. Check that all bushings and sections of the choke linkage are in good condition and working properly.

  6. 6

    Lubricate all linkage connections with a very small amount of lightweight grease. Push the choke button while watching the choke linkage to see if it operates properly. Start the engine and push the choke button while the engine is running to check if the electric choke is operating properly and affecting the performance of the engine as it should.

Tips and warnings

  • Take care not to cross or ground electrical connections as you have to test with the voltage on.

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