Sportster Carb

Discussion in 'Sportster Models' started by socalrebel, Oct 4, 2009.

  1. socalrebel

    socalrebel Member

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    I have a '89 sporty 883 with the old style Mikuni carb. It seems that the carb is all but completely shot and I can't get parts for it. I need to upgrade to a Mikuni 42. Is there any where to get a good used one or will I just have to bite the bullet and pay the $360 for a new one?
     
  2. chevito

    chevito Member

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    criag list just bought one for 100.00
     
  3. Breeze3at

    Breeze3at Well-Known Member

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    I just did a quick search on e-bay and saw several new 42mm Mikuni kits for $250 buy it now. More looking would probably turn up a better price.
     
  4. NEWHD74FAN

    NEWHD74FAN Experienced Member Retired Moderators

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    Socalrebel, the stock Keihin carb is actually quite a good carb and has been used for what seems like a ton of years so all the kinks were worked out long ago. Brand new rebuild kit is about $40 and really not much to "wear" out. Most common problem is varnish, rust, combustion deposits clogging openings, sticking parts like the CV needle valve/slide assembly, (easily accessed w/o removing carb), grooved float needle due to prolonged "sitting", the rubber/neoprene gets brittle and old.

    Oh, forgot one thing, some "modify" the CV emulsion tube with a 1/8" drill which doesn't work...causing irregular movement of and inconsistant mixture. All you need is to look in the self help section for diagram, tips on getting fueling right, a can of Gumout spray carb cleaner and a bit of careful disassembly and patience. Good luck and don't despair...!
     
    Last edited: Oct 5, 2009
  5. socalrebel

    socalrebel Member

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    By shot I mean it will not shut the fuel off at the needle seat. You can not get a kit for this carb as they are no longer manufactured apparently. When you turn the gas on it runs right thru the carb and onto the ground. It has been cleaned and checked, but no kits available.
     
  6. socalrebel

    socalrebel Member

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    Thanks for the tip on mikuni 42 kits, but I need the mikuni 42 carb before I can kit it. I have an old style mikuni...pre 42 series
     
  7. socalrebel

    socalrebel Member

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    The only trouble with the keihnin is I would have to replace all the intake and the like again. This came to me with the mikuni and I don't have all the original equip.
     
  8. socalrebel

    socalrebel Member

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    I have been on the website and they don't even acknowledge this carburator. I have not actually spoken witrh them

    It needs a kit with a new needle seat and they don't make them anymore. I can rebuild it if I had the parts
     
    Last edited by a moderator: Oct 5, 2009
  9. socalrebel

    socalrebel Member

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    Never heard of them, but I will try now. Thanks Hobbit
     
  10. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

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    Many carbs use similar parts the float needle from a bing carb from a bmw fitted and worked on a harley cv carb
    the rubber coating on the tip of the float needle hardens and prevents a liquid tight seal
    may be worth taking the float needle to a carb specialist or a tuning shop or an independant motrcycle dealer and see what the have thats the same or similar

    Brian