How to Clean a Mikuni Carb

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Mikuni carburetors are used on motorcycles and they will drastically affect the performance of your motorcycle if they become clogged with residual fuel buildup. You should clean your carburetor every time you re-jet the carburetor or perform a tuneup. To thoroughly clean your carburetor, you will need complete access to the entire carburetor assembly, so it should be removed from your motorcycle before you get started. Keep the carburetors on the rails throughout the cleaning process to maintain proper sync.

Things You'll Need

  • Spray carburetor cleaner
  • Screwdriver set
  • 3 pieces of copper wire, 12 inches long
  • Measuring Tape
  • Wire cutters
  • Locate the four retainer screws securing the float bowl to the underside of the Mikuni carb and unscrew them. Pull the float bowl up and out of the carb.

  • Slide out the retainer pin that is located on top of the floats and take the floats out of the carb.

  • Rotate the main and pilot jets counterclockwise until they come free from the carb and set them aside.

  • Twist together two wire segments and use them to push fuel buildup out of the large jet holes on the carb.

  • Insert the dingle wire segment into the small jet holes on the carb to scrape out the fuel residue.

  • Spray the carburetor cleaner into all of the jet holes.

  • Screw the jets back into the carb, manually.

  • Locate the metal tab that is attached to the fuel needle and bend it up or down to position the float right underneath the fuel needle.

  • Secure the float bowl in its original position with the four retainer screws. Perform the previous steps again to clean the second carburetor.

References

  • Scott Stoll, Certified Motorcycle Technician; Tampa, FL
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