1. Some members were not receiving emails sent from XJbikes.com. For example: "Forgot your password?" function to reset your password would not send email to some members. I believe this has been resolved now. Please use "Contact Us" form (see page footer link) if you still have email issues. SnoSheriff

    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.

NEED HELP SLOW RESTING IDLE

Discussion in 'XJ Technical Chat' started by CruzNCycles, Jun 4, 2016.

  1. CruzNCycles

    CruzNCycles Member

    Messages:
    59
    Likes Received:
    3
    Trophy Points:
    8
    Location:
    Daytona Beach Fl
    I recently swapped my 83xj650 into my xj750 frame(tore second gear in the 7)
    Turned it on and now the idle jumps around and after I let off it takes a little to settle down to idle if it doesn't just stay up
    I've lubed all my moving parts and cables there's no visible lag of the butterflies. I got new diaphragms and intake boots thinking it was an air leak in those but still the same issue
    It's already caused me to crash once so any help would be greatly appreciated
     
    CruzNCycles, Jun 4, 2016
    #1
  2. XJ550H

    XJ550H Well-Known Member Premium Member

    Messages:
    13,199
    Likes Received:
    3,862
    Trophy Points:
    113
    Location:
    Great North Woods
    did you use the 650 tci unit?
     
    XJ550H, Jun 4, 2016
    #2
  3. CruzNCycles

    CruzNCycles Member

    Messages:
    59
    Likes Received:
    3
    Trophy Points:
    8
    Location:
    Daytona Beach Fl
    The 650 motor didn't come with one, and I'm pretty sure I'm using an xj900 tdi would that cause my issue?
     
    CruzNCycles, Jun 4, 2016
    #3
  4. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

    Messages:
    19,657
    Likes Received:
    6,762
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    The 650 and 750 use the same TCI

    [​IMG]

    The XJ900 TCI is different, and does not have the same timing or advance curve.

    [​IMG]

    Get the correct TCI for your engine, and don't ride again until you do.

    There still may be some other problem causing the hanging idle, but having the wrong TCI installed isn't helping.
     
    k-moe, Jun 4, 2016
    #4
  5. CruzNCycles

    CruzNCycles Member

    Messages:
    59
    Likes Received:
    3
    Trophy Points:
    8
    Location:
    Daytona Beach Fl
    Nope I got the red one in! Cool I was always kinda curious about that
     
    CruzNCycles, Jun 4, 2016
    #5
  6. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

    Messages:
    19,657
    Likes Received:
    6,762
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    OK then.

    The most common cause of a hanging idle is a vccum leak.
    Grab a can of carb cleaner. Let the bike idle where it will, and begin methodically spraying down components one-at-a-time. Start with the throttle shaft seals, then work your way forward to the intake boots (including the gasket at the head, and the vacuum caps).
    Spray, wait, spray. It can take a few moments for the carb cleaner to get pulled in though a crack.
     
    k-moe, Jun 4, 2016
    #6
  7. CruzNCycles

    CruzNCycles Member

    Messages:
    59
    Likes Received:
    3
    Trophy Points:
    8
    Location:
    Daytona Beach Fl
    I've been spraying carb cleaner the shaft seals are these c clip things right? Nothing at the boots or intake gaskets I'm getting a little reaction from the right side throttle seal no where else if I push on it the idle goes up a little too
     

    Attached Files:

    CruzNCycles, Jun 4, 2016
    #7
  8. CruzNCycles

    CruzNCycles Member

    Messages:
    59
    Likes Received:
    3
    Trophy Points:
    8
    Location:
    Daytona Beach Fl
    How do I order from the catalog?
     
    CruzNCycles, Jun 4, 2016
    #8
  9. waldreps

    waldreps Active Member

    Messages:
    314
    Likes Received:
    71
    Trophy Points:
    28
    Location:
    Henning, MN
    Are you talking about the XJ4Ever catalog from the link at the top right of the page? If so, just start a conversation with member Chacal.

    Daytona Beach huh....I love Daytona Beach. I've vacationed there several times.
     
    waldreps, Jun 4, 2016
    #9
  10. CruzNCycles

    CruzNCycles Member

    Messages:
    59
    Likes Received:
    3
    Trophy Points:
    8
    Location:
    Daytona Beach Fl
    Thank you!!!! Ordering my shaft seals now
    Yeah Daytona is beautiful wayyyyy too hot today though
     
    CruzNCycles, Jun 4, 2016
    #10
    waldreps likes this.
  11. Xjrider92117

    Xjrider92117 Active Member

    Messages:
    994
    Likes Received:
    136
    Trophy Points:
    43
    Location:
    San Jose Ca
    If your getting new shaft seal you should also get fuel rail o right and a new fuel T.
     
    Xjrider92117, Jun 4, 2016
    #11
  12. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

    Messages:
    19,657
    Likes Received:
    6,762
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    Th o-rings are a good idea, but he won't need a new fuel T. The 650 and 750 have o-rings on the fuel T, instead of having that funny T the 550's have.
     
    k-moe, Jun 4, 2016
    #12
    Xjrider92117 likes this.
  13. Xjrider92117

    Xjrider92117 Active Member

    Messages:
    994
    Likes Received:
    136
    Trophy Points:
    43
    Location:
    San Jose Ca
    Guess I should get one so I would know. Haha
     
    Xjrider92117, Jun 5, 2016
    #13
  14. CruzNCycles

    CruzNCycles Member

    Messages:
    59
    Likes Received:
    3
    Trophy Points:
    8
    Location:
    Daytona Beach Fl
    Yeah I had to have my 550 carbs machined to accept o rings to put a new t into it haha way harder than just replacing the o rings like on the 550
    Oh yeah I own 2 750s , 2 650s, and 1 550 I really like the xj family they're solid bikes that can take take a beating they'd probably last me longer if I wasn't so prone to smashing into things
     
    CruzNCycles, Jun 9, 2016
    #14
  15. Polock

    Polock Well-Known Member

    Messages:
    9,751
    Likes Received:
    2,097
    Trophy Points:
    113
    Location:
    Beaver Falls, PA
    did you do a running sync?
     
    Polock, Jun 9, 2016
    #15
  16. CruzNCycles

    CruzNCycles Member

    Messages:
    59
    Likes Received:
    3
    Trophy Points:
    8
    Location:
    Daytona Beach Fl
    Yes
    I have a sync
    They are all at the same vac level
    But I have a question about the actual level (number) I'm up by 5 the only other one I saw was at 8
    Haven't needed it for the others
    That's directly related to the idle right?
     
    CruzNCycles, Jun 9, 2016
    #16
  17. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

    Messages:
    19,657
    Likes Received:
    6,762
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    Vacuum level relates to the compression on the cylinder being checked. There is no set amount of vacuum that you need to see, but there are general guidelines about how vacuum relates to engine health. http://www.secondchancegarage.com/public/186.cfm
    Scenario three describes a healthy state for our engines, but the amount ov vacuum seen is not typically as high.
     
    k-moe, Jun 9, 2016
    #17

Share This Page