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Sounds like a lawnmower.

Discussion in 'CVP Stage 1 Tuners Kit' started by Bigfish, May 11, 2012.

  1. Bigfish

    Bigfish New Member

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    Deluxe Stage 1 kit. new vacuum diaphram, acelarator gasket. new seal for carb. new choke cable, replaced manifold gaskets, pingel petcock- plugged of vacuum on top of carb- not sure if that was right- couldn't find the "t" according to the instructions. Runs the same anyway. Can see fuel coming out of the needle jet orifice. The silver nozzle in the carb where the needle goes is installed correctly. Have put the carb back to stock and it runs the same. sounds like a lawnmower-pop pop pop... any throttle roll and it coughs, and sputters. rejetted again, no change. what am i missing? Local bike shop wants me to buy an S@S carb kit. No.

    Thanks.
    Bigfish, May 11, 2012
    #1
  3. JohnnyBiker

    JohnnyBiker Well-Known Member

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    Did you put the needle in backwards? I did that once and that is what happened. Worth a shot.
    JohnnyBiker, May 11, 2012
    #2
  4. Bigfish

    Bigfish New Member

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    i double checked the pics of the needle jet. it is correct. i just took it out and reversed it- the wrong way, made no difference in how it runs.
    Last edited: May 11, 2012
    Bigfish, May 11, 2012
    #3
  5. JohnnyBiker

    JohnnyBiker Well-Known Member

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    I am talking about the actual needle. There is a carrier and then the spring goes on it. It can happen that the needle gets put in wrong order.
    JohnnyBiker, May 11, 2012
    #4
  6. kenfuzed

    kenfuzed Administrator Staff Member

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    A couple of things to check:
    1) As mentioned, make sure the needle jet is facing the correct direction.
    2) Float level. If the float got bumped it could have thrown off the level. Here is a diagram of the float level:
    Harley Carburetor Float Setting
    3) Since you have installed a new fuel petcock valve (Pingel) make sure it is delivering fuel. There are several models of that valve, so if you have the one that has a vacuum shutoff make sure to route a vacuum line from the top of the carb (where you said you plugged) to the petcock.
    4) Some models have an additional breather port on the side of the carburetor. It looks like a smaller version of the fuel elbow. If you have that it either needs to be connected to the larger hose which routes to a carbon canister or be plugged.
    5) Needle installed in the correct order. The needle must install first into the slide, followed by the plastic spring retainer, and then the spring.

    You also mentioned the vacuum diaphragm has been replaced. Did you replace the whole slide or just the diaphragm? I don't know of anyone making a replacement diaphragm and normally you have to replace the entire slide. But if you did replace the diaphragm with something else then perhaps the slide is not lifting properly.
    kenfuzed, May 11, 2012
    #5
  7. Bigfish

    Bigfish New Member

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    -needle jet correct
    -float level correct
    -no vacuum on pingel. should i have plugged off carb? plugged vacuum back in to carb runs even worse.
    -no breather port on carb.
    -entire slide replaced
    -needle installed in correct order.
    Bigfish, May 11, 2012
    #6
  8. kenfuzed

    kenfuzed Administrator Staff Member

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    If the engine is running better with the vacuum port uncovered there could be a blocked passage somewhere.

    Remove the mixture screw or EZ-Just. There should be a spring, washer, and o-ring that comes out. A missing o-ring can cause idle problems. Also check that the o-ring hasn't become jammed or cocked sideways in the passage. This could block the internal air passages that link to the pilot jet and front intake port.

    Cleaning the idle circuit passages. Requires compressed air.
    1) Remove the pilot jet.
    2) Remove the mixture screw, spring, washer, and o-ring.
    3) Spray a small amount of carburetor or fuel injection cleaner into the pilot jet passage and mixture screw passage. Do not allow any cleaning fluid to come in contact with the slide diaphragm (remove if desired).
    4) Use compressed air to clear the passages. WEAR PROTECTIVE EYEWEAR.
    a) Start by covering the pilot passage hole with your thumb and use the nozzle of the compressed air on the mixture screw hole. Air should come out of the air intake jet shown in the picture below.
    b) Repeat the same procedure covering the mixture hole and using the air on the pilot jet hole.

    Attached Files:

    kenfuzed, May 12, 2012
    #7
  9. Bigfish

    Bigfish New Member

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    Will give that a shot.
    Bigfish, May 12, 2012
    #8
  10. hotroadking

    hotroadking Super Moderator Staff Member

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    If you have a pingle the vac port on the manifold needs
    to be capped or it won't run right.
    hotroadking, May 12, 2012
    #9
  11. Bigfish

    Bigfish New Member

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    no vacuum port on the intake manifold so i capped off the vacuum on the carb. it runs but not well, even when i make adjustments. i uncapped the vacuum on top of the carb and it will not start. just turns over. thinking i have a vacuum issue or some crap in the carb. will try a thorough cleaning when i get home in a couple weeks.
    Bigfish, May 13, 2012
    #10

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