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2006 883 custom carb tune

Discussion in 'Motorcycle Tech Talk' started by FH883, Sep 6, 2018.

  1. FH883

    FH883 New Member

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    Hey guys! New to the site as a member but have read a few threads that were informative and answered by people who actually seem to know what they're talking about, so wanted to post here to help clarify the proper things needed for optimal tuning of my carb.

    I have a '06 883 custom with SE intake and VH exhaust. The carb was left stock and overall the bike runs okay, but looking for a little more performance and hopefully eliminate or reduce the "lag" or "burp" just off idle.

    Ive seen many videos and posts on ideas to tune the carb, but wanted to get clarity on what is the actual best setup regarding:

    - Slow jet - stick with stock 42 or move to a 45?
    - Enrichment screw - 2-1/2 or 2-3/4 turns?
    - Needle - to shim or not to shim?
    - Main jet - what size is best considering my current setup and proposed other carb updates?
    - Slide spring - nip one full turn off? more, less, nothing?
    - How bout the slide? Im seeing concepts for drilling out the rear hole in the slide and filing down the edges. is this necessary or just a gimmick?

    Any help is greatly appreciated and thanks in advance.
    Last edited: Sep 6, 2018
    FH883, Sep 6, 2018
    #1
  3. Fatboy128

    Fatboy128 Well-Known Member

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    Send a Private Message to "kenfuzed" He's the man for carbs!
    Fatboy128, Sep 6, 2018
    #2
    FH883 likes this.
  4. FH883

    FH883 New Member

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    Will do! thx, bud
    FH883, Sep 6, 2018
    #3
  5. hotroadking

    hotroadking Super Moderator Staff Member

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    Don't nip the spring

    DO NOT drill out the slide hole, it's an old trick that causes problems.

    In the casting of the slide sometimes the hole was partially blocked with
    production slag, so "cleaning" it up with a drill bit was ok, but that morphed
    into "bigger must be better", it's not, if the hole gets too large the slide will
    hunt up and down and cause you problems.

    Turn in the idle screw GENTLY until it bottoms, do not tighten, just
    feel it touch, then back out 2.5 turns to start, adjust from there.

    As to jets, Ken would know whats best for an 883
    hotroadking, Sep 7, 2018
    #4
  6. Fatboy128

    Fatboy128 Well-Known Member

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    Holy Cow HRK! You never cease to amaze! U DA MAN
    Fatboy128, Sep 7, 2018
    #5
  7. FH883

    FH883 New Member

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    Thanks hotroadking! appreciate the info. I shot Ken a private message and he gave me some good advice, so Im going to check out some info on a site and then proceed from there. Thanks for the help, fellas!
    FH883, Sep 7, 2018
    #6
  8. Fatboy128

    Fatboy128 Well-Known Member

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    :vulcan:
    Fatboy128, Sep 8, 2018
    #7

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