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  1. Thanks steve45. ALSO....use a shop vac on the...

    Thanks steve45.

    ALSO....use a shop vac on the engine side of the carbs to test vacuum slide operation. Just stick it on the carb and open the throttle. You will see the slide rise open. Depending...
  2. And finally on to the fuel pump. Check or replace...

    And finally on to the fuel pump. Check or replace the diaphragm, clean everything, and replace this o'ring.

    If anybody else has anything to add please feel free to do so.
  3. Another fairly common issue I find on these is...

    Another fairly common issue I find on these is worn out needles on the slide. This needle controls the fuel flow out of the main jet from just off idle all the way to WOT. Vibration through the years...
  4. The vacuum slides can wear, and so can the piece...

    The vacuum slides can wear, and so can the piece they slide IN. If they look like these.......they are worn out and likely sticking as they try to move up and down. This will cause bogging,...
  5. The problems I usually find with these carbs are...

    The problems I usually find with these carbs are usually in the vacuum slide portion. Clean the tiny metal orifice in the outer edge of the diaphragm. Be careful blowing carb cleaner or air through...
  6. These carbs have a pilot screw adjuster but they...

    These carbs have a pilot screw adjuster but they are hidden behind plugs. Use a 1/8" drill bit to carefully drill through the plug. Then screw that #8 wood screw in a little and pull the plug out to...
  7. The first step would be to disassemble EVERYTHING...

    The first step would be to disassemble EVERYTHING for cleaning and inspection. There are rebuild kits available that come with the basic parts. The vacuum slide parts are not available any more. If...
  8. Helpful tips on the infamous CDKCV carbs. Ultra 150, Zxi, STX

    I've done a LOT of these over the years and thought I'd share some helpful tips for those who are trying to make a set of these CDKCV Keihin carbs work properly.
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