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what is this screw

Discussion in 'XJ Technical Chat' started by mark.deady, Mar 6, 2008.

  1. mark.deady

    mark.deady Member

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    looking to find out what this is
     

    Attached Files:

    mark.deady, Mar 6, 2008
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  2. BlueMaxim

    BlueMaxim Active Member

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    Idle adjustment screw that is!
     
    BlueMaxim, Mar 6, 2008
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  3. mark.deady

    mark.deady Member

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    thought so.... thanks a bunch.....
     
    mark.deady, Mar 6, 2008
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  4. PainterD

    PainterD Active Member

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    ....and that blue cloth thingy, is your air filter!! :D
     
    PainterD, Mar 7, 2008
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  5. bluzglide

    bluzglide Member

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    Either that, or he is trying to keep the carbs anonymous!
     
    bluzglide, Mar 7, 2008
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  6. PainterD

    PainterD Active Member

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    Shhhhhhhhh
    ...those are secret carbs. Engineered to be the ultimate performance upgrade in the history of the XJs. That or they're just too dirty to show us!
     
    PainterD, Mar 7, 2008
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  7. mark.deady

    mark.deady Member

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    not my pic... just one i found that had the screw that i was asking about.... sorry dont know anything about them.... i guess he just wanted to keep junk out of the carbs....
     
    mark.deady, Mar 7, 2008
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  8. greg_in_london

    greg_in_london Member

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    I liked the other stories better.

    Like the old irish tune: 'I got a mikuni trimmed with blue'

    Or are they hitachis ?
     
    greg_in_london, Mar 8, 2008
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  9. Kasper

    Kasper New Member

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    In my case even when my bike is warmed up my idle is below 700 rpms. If i don't continually rev then the engine it will die. Can i just adjust my idle up with that blue framed screw?

    It was nice of the owner to keep the carbs warm in the recent cold.

    kasper
     
    Kasper, Mar 9, 2008
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  10. MiCarl

    MiCarl Active Member

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    Your idle is set way too low. Spec. is 1050. Crank it up!
     
    MiCarl, Mar 9, 2008
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  11. RickCoMatic

    RickCoMatic Well-Known Member

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    Yes. That Adjuster makes contact with a shelf on the Linkage that moves the whole set of Butterflys open or closed as the Idle Adjustment Rod is turned.

    You can look down in between the middle carbs and see the end of the rod come in contact with the shelf on the linkage it moves.
    Adjust the rod so that it just touches the shelf.

    Run the bike.
    If you need more Idle Speed ... turn the Rod in moving the shelf and the whole linkage to open the Throttles a bit.

    Ideally, you'd like to have the Pilot Mixtures set so that you don't need to add much Idle Adjustment. The Rod introduces Air for about a quarter of a turn then begins Metering Main Jet Fuel into the Engine ... depending on if your Carbs are Mikuni or Hitachi.
     
    RickCoMatic, Mar 9, 2008
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  12. TECHLINETOM

    TECHLINETOM Member

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    "You can do anything but lay off of my blue framed screw!";)
    ( Carl Perkins and Elvis spinning in their graves @5200 R.P.M. )
     
    TECHLINETOM, Mar 9, 2008
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  13. Kasper

    Kasper New Member

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    HAHA Right on, gonna turn up the heat a bit. Thanks for the advice.

    kasper
     
    Kasper, Mar 10, 2008
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  14. BlueMaxim

    BlueMaxim Active Member

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    I give a simple straight answer and figure no sweat he's got it now. I see 12 replies so I check in to see what is going on.....hehehe......I think you guys are getting spring riding fever! Probably brought on by the snow. So find the old lady....mate a few times...and spring will be here!
     
    BlueMaxim, Mar 10, 2008
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