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1981 xj650 maxim throttle and choke hookup

Discussion in 'XJ Technical Chat' started by 2wheeltimmy, Jul 23, 2012.

  1. 2wheeltimmy

    2wheeltimmy New Member

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    Hey guys I'm having trouble hooking up the throttle and choke cables on my 81 xj650, any help would be appreciated. There's two hookup spots on the carbs. One down the middle of the carb rack and one off to the right side. My hunch is the the right side is for the throttle but I hooked it up and could barely twist the throttle at all. So idk...
     
  2. mrbug

    mrbug Member

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    The one in the middle is for the throttle, the one on the right is for the choke.
     
  3. 2wheeltimmy

    2wheeltimmy New Member

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    So, whats wrong if I hook it up to the middle one and I can barely twist the throttle? I mistyped when I said I hooked it up to the right one, I meant the middle.
     
  4. iwingameover

    iwingameover Active Member

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    it's catching on something or the cable is bound up.
     
  5. fintip

    fintip Member

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    First pull the throttle housing up by hand, and make sure the binding isn't on the carb itself. Then, with it disconnected, pull the throttle and you should see the cable retract accordingly. Let us know that both of those things go smoothly first.

    You can tell which is the choke by seeing which one pulls up the four plungers (thus opening the enrichment circuits). And yes, that's the right side, you had it correct.
     
  6. 2wheeltimmy

    2wheeltimmy New Member

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    Ok thanks, I took the carbs off and and made sure its not binding and also tried the throttle cable itself and that moves freely. So... Is it just down to adjusting the throttle cable now? I am truly lost at this point.
     
  7. mrbug

    mrbug Member

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    If the attachments don't make it look in my gallery in the carbs folder. There are two pictures of how they should look hooked up.
    [​IMG]

    [​IMG]
     
  8. 2wheeltimmy

    2wheeltimmy New Member

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    So, whats wrong if I hook it up to the middle one and I can barely twist the throttle? I mistyped when I said I hooked it up to the right one, I meant the middle.
     
  9. mrbug

    mrbug Member

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    Do you have the cables hooked up and anchored like my pictures show? Are you sure the cable is seated properly on the carb side? It needs to be seated inside that bracket. Are you sure that the cable is seated properly on the throttle side? If all of the above is true and the butterflies are moving free, your cable is in a bind somewhere. Did they work before properly before you unhooked them to remove the carbs? When you unhooked them the first time, how did you do it and from what point? Have you tried Fintip's suggestions?
     
  10. 2wheeltimmy

    2wheeltimmy New Member

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    Yeah it looks like how it should be according to those pictures. And everything moves freely except when its all hooked up.
     
  11. fintip

    fintip Member

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    Well that doesn't make sense, frankly. If you can pull the assembly by hand, you know the problem isn't there. And if the cable moves freely when twisting the throttle, then where is the magic moment that it stops?

    What I mean is, with the info you've given me, I can imagine it would work like this:

    I have someone pulling the throttle in and out at a steady rate. While they are doing it, I correctly hook up the throttle cable. The moment it hooks up, all of a sudden I can't pull. Doesn't make sense.

    Try something to that effect, and see what is the exact moment it binds. Maybe that'll tell you something. As it stands, I'd say you have to be hooking something up wrong.

    Does it work when you connect the cable to the flex-arm, but don't put the cable through the carb-hat mount? You just have to isolate the problem here now. My strategy above was to isolate: problem in carbs, or problem in cable? But according to you problem is in neither, so now I'm guessing that it's in the connecting point between the two.
     
  12. mrbug

    mrbug Member

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    Without the cable hooked up to the carbs but still connected to the throttle, does the throttle turn freely? Do you have a throttle lock on the grip by chance?
     
  13. 2wheeltimmy

    2wheeltimmy New Member

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    Yeah without it hooked to the carbs it moves freely. There is a lever thing to the left of the throttle.
     
  14. mrbug

    mrbug Member

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    Did your throttle work fine before you first took everything apart, or is that the reason you took everything apart.
     
  15. 2wheeltimmy

    2wheeltimmy New Member

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    No I got the bike with the carbs off and everything disconnected.
     
  16. mrbug

    mrbug Member

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    One thing that happened to me on my Honda, the throttle linkage was getting hung on one of the boot clamps. Take the gas tank off and look around to see if anything could be hitting it. If everything else is right, you either have the choke and throttle cables hooked up backwards or your throttle cable is in a bind.
     
  17. 2wheeltimmy

    2wheeltimmy New Member

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    Ok guys thanks for the help I just figured it out. The windings on the carb rack were sticking enough where I couldnt move it with the throttle but I could with my hands. So I just sprayed pb blaster on it and now it works. Maybe I can even get it running tonight... Lol.
     
  18. 2wheeltimmy

    2wheeltimmy New Member

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    And upon further investigation its was the intake boots clamps that was causing the problem. So you were right mrbug thanks again.
     
  19. mrbug

    mrbug Member

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    No problem, that is what we are all here for. Sorry it took so long for me to remember about the clamp.
     

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