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.

High Idle/Creeping idle

Discussion in 'XJ Technical Chat' started by Dazsculpt, Aug 25, 2009.

  1. Dazsculpt

    Dazsculpt Member

    Messages:
    115
    Likes Received:
    2
    Trophy Points:
    18
    Location:
    Antwerp, Belgium
    I have a 1982 yamaha xj 650 RJ
    When I get my bike running it idles @ 2000rpm [too high I know] ride it around and starts to creep a little, I try to turn the middle screw to idle down the revs but without any luck.
    So will check for air leaks at the boots either end, wanted to know any tried and tested methods in testing this with carb cleaner [as I have this at hand].
    I need to sync and adjust my valves, and I am thinking this maybe why I have a creeping idle.

    Any advice???

    Daz
     
    Dazsculpt, Aug 25, 2009
    #1
  2. helmet

    helmet Member

    Messages:
    755
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    On 2 wheels... just lost my hat.
    starting with air leaks is good. it sounds like you are pulling in air where you dont want it.
     
    helmet, Aug 25, 2009
    #2
  3. Dazsculpt

    Dazsculpt Member

    Messages:
    115
    Likes Received:
    2
    Trophy Points:
    18
    Location:
    Antwerp, Belgium
    Helmet

    How do I test for air leaks?

    Thanks
    Daz
     
    Dazsculpt, Aug 25, 2009
    #3
  4. dqnjuan

    dqnjuan Member

    Messages:
    198
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    bmore, md
    When idling carefully spray carb cleaner, propane, or starter fluid, around the rubber boots of the manifold and on the sides of the carbs where the throttle shaft seals are. If it surges at any time when you spray, you have a leak.

    You could just be lean too but def do the quick test to check and go from there.
     
    dqnjuan, Aug 25, 2009
    #4
  5. Broke_Dirty_Maxim

    Broke_Dirty_Maxim Member

    Messages:
    234
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Jacksonville, NC
    When you say the middle screw, are you referring to the synch screws in the front, or the idle screw, which is located in the middle but at the back of the carbs?
     
    Broke_Dirty_Maxim, Aug 25, 2009
    #5
  6. Dazsculpt

    Dazsculpt Member

    Messages:
    115
    Likes Received:
    2
    Trophy Points:
    18
    Location:
    Antwerp, Belgium

    I mean the idle screw at the back......But..I have another problem I noticed one of my carbs is leaking fuel when I went to un do amd tighten the air boot to that carb fuel poured out...ah!!

    I suspect sticking needle or float wrong position
     
    Dazsculpt, Aug 26, 2009
    #6
  7. Dazsculpt

    Dazsculpt Member

    Messages:
    115
    Likes Received:
    2
    Trophy Points:
    18
    Location:
    Antwerp, Belgium
    Hi Thanks man, I'll try that, I had a quick look at the carbs again one float was way off and changed a needle valve to the original one as it was in good nick, I'm just trying to eliminate things as I go.

    I'll tell you what I find

    Daz
     
    Dazsculpt, Aug 27, 2009
    #7
  8. Dazsculpt

    Dazsculpt Member

    Messages:
    115
    Likes Received:
    2
    Trophy Points:
    18
    Location:
    Antwerp, Belgium

    The idle screw

    Thanks
     
    Dazsculpt, Aug 27, 2009
    #8
  9. albran

    albran Member

    Messages:
    180
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    DFW, USA
    You might want to check your oil.

    I took 4 qts out when I bought my 750.
    The float for carb #3 had never touched the needle after the PO tried to rebuild the carbs and the petcock leaked.

    ab
     
    albran, Aug 27, 2009
    #9
  10. Dazsculpt

    Dazsculpt Member

    Messages:
    115
    Likes Received:
    2
    Trophy Points:
    18
    Location:
    Antwerp, Belgium
    Hi
    You were right when I tested for leaks the bike surged near the throttle shaft seal near carb 2, i broke the carbs apart and found the seals had been snagged and thus letting air in....a quick email to Chacal and the parts are being sent my way, give me 3 weeks and I'll be back on the road again!!!

    Cheers for the help

    Keep rockin!
     
    Dazsculpt, Aug 29, 2009
    #10
  11. baz666

    baz666 Member

    Messages:
    401
    Likes Received:
    1
    Trophy Points:
    16
    Location:
    Washington, DC
    Good old Chacal. Without him it'd be tough to keep these old beasts running.
     
    baz666, Aug 30, 2009
    #11
  12. Wyldman

    Wyldman Member

    Messages:
    174
    Likes Received:
    0
    Trophy Points:
    16
    I run a biker forum on another set up and just last night I recommended both this site and Chacal to a new forum member. IMO this site is a MUST if you own an XJ. :)
     
    Wyldman, Aug 30, 2009
    #12

Share This Page