1. Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

my carb screws are 7 turns out

Discussion in 'XJ Technical Chat' started by simusix, Jul 13, 2011.

  1. simusix

    simusix New Member

    Messages:
    18
    Likes Received:
    0
    Trophy Points:
    1
    help
    the only way I can get my xj750 seca to idle smoothly is tgo have all carb screws 7 turns out , have balanceds with yics tool and color tuned ( mixtutre is correct on color tunes), any idea why idle screws have to be out this far ?.
    pilot jets wrong ??
    any help would be cool
    cheers simon
     
    simusix, Jul 13, 2011
    #1
  2. jmilliken

    jmilliken Well-Known Member

    Messages:
    1,572
    Likes Received:
    46
    Trophy Points:
    48
    Location:
    Dillsburg, PA
    4 screws? Pilot screws.... theres also your idle adjustment screw which is the knob in between 2 + 3!
     
    jmilliken, Jul 13, 2011
    #2
  3. wizard

    wizard Active Member

    Messages:
    5,282
    Likes Received:
    26
    Trophy Points:
    38
    Location:
    DEVON ENGLAND
    how clean are those little old passages down there ?
     
    wizard, Jul 13, 2011
    #3
  4. simusix

    simusix New Member

    Messages:
    18
    Likes Received:
    0
    Trophy Points:
    1
    I could understand a passage being blocked in one carb if that carbs mixture screw was a large number of turns out or in , but all 4 carb mixture screws have to be around 7 turns out , with yics tool installed and colortunes installed in two carbs at once seven turns out is where the mixture is correct, so is unlikly that all 4 carbs passages are blocked.

    I have cleaned out carbs according to forum readings on this site.
    do you think maybe that I have aset of carbs of a non yics model with differnt pilot jets ?
    this bike has never run right since I bought it so maybe has wrong carbs
    on it?

    thanks simon
     
    simusix, Jul 15, 2011
    #4
  5. simusix

    simusix New Member

    Messages:
    18
    Likes Received:
    0
    Trophy Points:
    1
    can remember ,,, is turning out making richer or weaker ? cheers simon
     
    simusix, Jul 15, 2011
    #5
  6. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

    Messages:
    14,792
    Likes Received:
    5,119
    Trophy Points:
    113
    Location:
    near utica, new york
    It is possible, then, that you may have a set of carbs on it from a 650. The bodies are the same, but the jets are different size.

    Model Fuel main Fuel Pilot Air Main Air Pilot
    XJ750 120 43 80 205
    XJ750 Police 118 43 80 195
    XJ750RL (‘84) 106 40 or 41 70 225

    XJ750E-II 102(2/3)
    105(1/4) 40 70 225
     
    hogfiddles, Jul 15, 2011
    #6
  7. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

    Messages:
    14,792
    Likes Received:
    5,119
    Trophy Points:
    113
    Location:
    near utica, new york
    Hmm... no matter what I do, it won't come out right. If you need me to translate it, I will try. Basically, tell me me exactly which bike is yours and what the numbers are supposed to be. Of course, if you're really good at figuring out spacings and can recreate the table, lucky you! :)

    Dave Fox
     
    hogfiddles, Jul 15, 2011
    #7

Share This Page