How to Unclog a Carburetor Jet

Written by chris gilliland Google
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A common problem that plagues carburetted motorcycles is the tendency to develop a clog during extended periods of inactivity. Clogs are caused by the slow degradation of fuel, which turns into a greenish sludge that clogs the carburettor's fuel jets and passageways. This effectively strangles the carburettor and prevents the motorcycle from being fuelled properly. Cleaning a clogged carburettor can be a tedious job, especially when it comes to clearing the tiny jets. Fortunately, the job can be made easier with the right tools.

Skill level:

Things you need

  • Carburettor cleaning solvent
  • Metal pot or container
  • Hotplate or other heat source
  • Air compressor
  • Wire

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  1. 1

    Pour an equal amount of water and cleaning solvent into a metal pot or container. Place the container over a hotplate or similar heat source and bring the solution almost to a boil.

  2. 2

    Disassemble the carburettor and carefully remove the clogged jet from the carburettor.

  3. 3

    Remove any rubber O-rings that may be attached to the jet and submerge the jet into the warmed carburettor cleaning solution. Allow the jet to soak for 10 minutes.

  4. 4

    Remove the jet from the cleaning solution and rinse it thoroughly with clean water. Allow the jet to dry naturally.

  5. 5

    Check that the jet has been cleared by blasting compressed air through the jet. If the jet is still clogged, pass a small, stiff wire through the jet and soak the jet for another 10 minutes.

  6. 6

    Reinstall the jet into the carburettor and repeat as necessary.

Tips and warnings

  • Carburettor cleaning solutions can damage rubber components. Be sure that any O-rings, seals, or bushings are removed before placing the carburettor and jets into the cleaning solution.
  • Jets can be damaged very easily, so take your time when removing the jets from the carburettor.

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