XL 883 low speed lag or miss

Discussion in 'Sportster Models' started by Baggh, Jun 17, 2008.

  1. Baggh

    Baggh Active Member

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    Hey all,

    When my bike gets up to operating temp it will "lag" or "miss" intermittenly when I am pulling out from a stop. It doesn't happen everytime but it is certainly annoying... and can be dangerous if I am pulling out in traffic, especially riding 2up.

    It has Vance and Hines pipes... I am not sure if the air cleaner was altered or changed from stock... or if it was jetted. Could it need a different airbox to open it up, simply adjust the fuel mixture screw a tad, clean the carb, or rejet?

    I'm certainly hoping that its an adjust fuel mixture screw fix :)

    thanks in advance for any help
     
  2. glider

    glider Veteran Member

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    Not knowing what has been done to the bike, it's difficult to say what it needs. Could be jetting or even a plug/wire fouling out or going bad. Once you find out if the bike was jetted, then you can go from there. Best way is to look and see what jets are in there now. Also look to see if the idle mixture screw concealment plug has been removed exposing the screw itself, should give you an indication if anything was done to the carb or not.
     
  3. Baggh

    Baggh Active Member

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    thanks guys... when I get home this evening I'll check all this out. I'll let you know what happens.

    Appreciated as always
     
  4. The Bad Man's Angel

    The Bad Man's Angel Active Member

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    Had the same problem with mine, I removed the idle fuel mixture screw plug and adjusted it (turned it out 2 full turns from fully seated) runs great with no miss or lag.
    Off Idle stutter or miss - Harley Davidson Community
     
  5. glider

    glider Veteran Member

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    It's great that you furnish the link to that thread. Saves a lot of double posting the same info.

    Thanks!:s
     
  6. Baggh

    Baggh Active Member

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    thanks BM Angel... now that you mention it I remember your post about this prob... I even commented in it... duh.

    do you recall where that brass plug is located? I took my aribox off yesterday and gave the carb a gander. It appears to be on the side facing the rear of the bike.

    thanks
     
  7. The Bad Man's Angel

    The Bad Man's Angel Active Member

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    Twin Cam CV Carb Rejet Suggestions - Harley Davidson Community
    I followed this self help tech tip posted here on the forum!
    This place is so great and the Mr. Glider is the HD god to me!!!
     
  8. glider

    glider Veteran Member

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    Look from the horn side of the bike between the cylinders.

    [​IMG]
     
  9. Baggh

    Baggh Active Member

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    thanks all. wow... this site has much more than first meets the eye. There is a libraries worth of information (much of it with supporting pics)!

    Glider... I used the below image to find the idle screw on my sporty and it appears to be where mine is located. I eyeballed it when I got in today. The brass cap has already been removed so chances are the previous owner already jetted it (has Vance and Hines pipes). The pic you displayed within this thread is the float bowl drain I believe.

    CV Carb Rejet Pics - Harley Davidson Community

    Is the "idle screw" what I need? Is it the same as air\fuel screw (I jetted my TTR 230 dirtbike and it was the fuel screw).

    Also... one final question before i get to turning the screw... is this necessary? Meaning... I only get this miss every once in awhile and "only" when starting out. Other than that it runs like a champ. Still... there shouldn't be a miss at all.
     
    Last edited: Jun 18, 2008
  10. glider

    glider Veteran Member

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    Woops....sorry, wrong train of thought here.:D

    The idle mixture screw that you posted is what I should have posted. Readjusting that in many cases will eliminate some lean mixture problems on some bikes without getting into the carb proper.

    Wouldn't have been a bad idea either to drain the carb float bowl in any event. I like to do it periodically at services on carbed bikes to remove any sediment or water that accumulates in there.