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CV Carburetor Question and Help

Discussion in 'Motorcycle Tech Talk' started by Marc1340, Dec 6, 2014.

  1. Marc1340

    Marc1340 Active Member

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    What do you think it also maybe?
    Found a small leak on the manifold with the carb cleaner, at a high idle changed but minor. Ordered them from the mainland may take a few days. Once they are here will replace them and go back to the original set-up on the carb. 180 and 42 jets, and put the needle back. Will keep you advised.
  2. hotroadking

    hotroadking Super Moderator Staff Member

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    Since you are turning the screw in and it's not killing the engine either the pilot is too big or the choke isn't seating fully.

    The main doesn't come into play until wot
    The needle is your mid range meter
    Pilot Jet is for idle and just off throttle.

    Take some time to check the choke cable disconnect it from
    the tab on the tank, make sure it's going all the way back in
    and closing it off, you may need to remove it and clean out the carb body

    But for now it sounds like the choke may not be fully closing.
  3. FLHTbiker

    FLHTbiker Moderator Staff Member

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    Yep and that's why I suggested the choke might be an issue to.
  4. Marc1340

    Marc1340 Active Member

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    hotroadking and FLHTbiker running a 42 for the pilot. I just replaced the cable in the parts I got from the states, brand new same size cable from Harley, is there anyway of checking this to see it is closing while I have the Carb Off. I will remove it tonight and clean it very good and will update you asap when I get the manifold seals.
    Thank you for the info
    Marc
  5. baggerpaul

    baggerpaul Well-Known Member

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    Make sure that when you swaped the choke cable valve from one cable to the othe that the spring is seat correctly on the choke passage valve (the brass piece that slides back and forth also that the paper gasket is not covering the breather passage also it will make tje carb run full rich !
  6. hotroadking

    hotroadking Super Moderator Staff Member

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    that, and the adjuster at the tank where you mount the end of the cable, be sure you havent over adjusted and the cable cannot close all the way, easy way to tell is to take it off the tank and see if the cable closes further.
  7. Lucifer

    Lucifer Well-Known Member

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    Yeah, it's only a short cable ,you don't want sharp bends in the routing,try it with it hanging loose...you should been lean,not fat with a 42 pilot jet
    FLHTbiker likes this.
  8. Lucifer

    Lucifer Well-Known Member

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  9. Marc1340

    Marc1340 Active Member

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    You guys are the best, going to look at all the info you sent and check it all, pulled the manifold yesterday ordered the seals and new flanges yesterday they have to come from the Harley Dealer on the mainland which take a few days. The seals were original from 1996, they showed some blow by on the outside edges. Going to clean it all up today, making sure the seals will sit properly. I do have the service manual and picked up some tips on the net. Will keep you updated asap when done.
    Thanks Again
    Marc
  10. hotroadking

    hotroadking Super Moderator Staff Member

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    Good luck send us pictures of the ladies on the beach once you're riding!
    Marc1340 likes this.
  11. Marc1340

    Marc1340 Active Member

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    I sure will, More cows here than people LOL, My Idea is to get to the Mainland Portugal and tour Eroupe
  12. FLHTbiker

    FLHTbiker Moderator Staff Member

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    Glad your onto the right track I'll bet that manifold leaking like that was a major factor and I know many guys have pulled their hair out tring to figure it out.

    How big is the island your on?
  13. baggerpaul

    baggerpaul Well-Known Member

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    If the maanifold was leaking bad the unmetered air would have caused a lean condition not a rich boys the plugs would look clean not black and sooty! Boys !
  14. bambidee

    bambidee Active Member

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    Agree with B/P Back to the start, no large change in elevation, ran good before shipped. Doe's it start crisp with no throttle hot, or long crank/ black smoke =possible float problem= dropped in shipping? The other thing is choke/ enrichner? Have watched the thread, humidty/air density should be a small tuning factor not a huge change. Look at history and think outside the box as in what and where did the change occur. jmo
  15. baggerpaul

    baggerpaul Well-Known Member

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    Ok stock jetting he had before with a clean carb and the cv performance kit .it should run tits with the new coil wires and plugs . You need to go back to the carb and make sure the slide area is assembled in the correct order is the needle jet and tube assembled in the proper order . And if not look at the cv performance assembly picture ken has listed in the cv performance forum tech area here on the site i have a feeling the fuel is not being controlled out of the main jet area .
  16. bambidee

    bambidee Active Member

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    My guess is in the carb as B/P thinks. You need to backtrack and check the carb and enrichner close. The carb worked good before you got there but there have been a lot of changes since you got there. Any chance you can use a carb from another bike for a ride with fresh plugs?
  17. kickstand68

    kickstand68 Active Member

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    Good read fellas... . If it was running good when it was at sea level in the states, I would think it would be close to the same on an island. The elevation issue is oxygen/fuel mix. I do not think humid air will cause much of an issue. Is it possible the gas you are getting is funky or possibly went bad?
  18. cowboy

    cowboy Moderator Staff Member

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    kickstand68 the gas he's getting over there was my first choice as well , he said he ran good before shipping the bike & bad after he picked it up
  19. FLHTbiker

    FLHTbiker Moderator Staff Member

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    He also said he was getting blow by at the manifold so it does need changing and yea gotta start someplace first. I know soot means it's rich and I'm still thinking choke myself. The gas could effect it somewhat to and hope it was new gas in it.
  20. Marc1340

    Marc1340 Active Member

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    Hey Guys, Ordered the parts, new manifold flanges and seals are on they way, going to go back to the original set-up on the carb when I put it back together seeing it was running good when I first got here. Take a bit of time to get parts here so soon as I get them hopefully (fingers cross) it will run a lot better. The Gas was New full tank when it started out after changing the coil and wires. As far as trying another Carb try, that can't happen here, there is only 35 Harleys here and I would say 40% of them are FI. I am going to be very diligent putting it back together just one question what is the best way to tork theses manifold bolts? They are allen head on all 4 of them.

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