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Discussion in 'XJ Technical Chat' started by foxfighter, Apr 9, 2007.

  1. foxfighter

    foxfighter Member

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    so bike still wont rev but rev is improving the more i run it. however i just tried to drive it and about half way down the block a really loud metal on metal sound started coming from the shaft area?????????? what is it? 8O
     
  2. RickCoMatic

    RickCoMatic Well-Known Member

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    I have absolutely no idea.

    All anybody could do is just guess.

    I'm thinking that a lot of the folks already guessed ... and, because their guess wasn't anything good ... they don't want to disappoint you with their guess of something real bad.

    I'm not going to guess. I guess because my guess would be guessing something bad too.

    Your guess is as good as mine.
     
  3. Fraps

    Fraps Member

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    Are you sure you are topped up with gear oil? Aside from that, I can only guess that you need to adjust the backlash.

    Have a good look and make sure it isn't your brake shoes all busted up either.
     
  4. Altus

    Altus Active Member

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    As stated - check the rear gear oil, and assuming that's good - go see a mechanic to have everything else checked out. It'll be worth your money.
     
  5. woot

    woot Active Member

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    Or you could start debugging.

    Turn the bike off - put it on the centerstand - put it in neutral - turn the rear tire. Clunk or no clunk?

    +1 on taking it to someone who knows what is going on.
     
  6. foxfighter

    foxfighter Member

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    bike was 100 bucks i dont want to invest much. bike off and in neutral still does it. i can feel the metal gronding vibration on the driveshaft. fluid was old but full so i changed it.
     
  7. RickCoMatic

    RickCoMatic Well-Known Member

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    Clunk, buh-bump bump, clunk.
    Clunk, buh-bump bump, clunk?

    Sound like that?
     
  8. Fraps

    Fraps Member

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    Boom shalack lack boom!

    Rick - you crack me up.
     
  9. RickCoMatic

    RickCoMatic Well-Known Member

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    Oh ...

    You have a broken Universal Joint.

    Push the Big Rubber Boot back and see how bad it looks.
     
  10. foxfighter

    foxfighter Member

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    no it doesnt go boom shaka laka boom it goes reaaaaarrrrrr.........rrrrrrreeeeeeeeeearrrrrrrrreeeeeee kkkkkkkkkkk reaaaaaaakkkkkkkkkkkkk lmao ya so thats the sound
     
  11. foxfighter

    foxfighter Member

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    well i got the back tire off and its not the brakes its coming from the driveshaft i think it might be bent? i need to get another larger socket tomorrow to get it off tho.
     
  12. schmuckaholic

    schmuckaholic Well-Known Member

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    Who put the "bop" in the Bop Bop ShooWop?
     
  13. RickCoMatic

    RickCoMatic Well-Known Member

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    Bee-boppa-loo-yah ... she's my baby!

    You're taking the ass-end off because you know it's a bent shaft ... or, because you think it's a bent shaft and might be the U-joint?


    Your momma can't dance and your daddy don't rock-'n-roll.
     
  14. foxfighter

    foxfighter Member

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    cause i dont know anything about bikes but im looking to find meatal shavings or scratches somewhere
     
  15. ridz

    ridz Member

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    Ride hard and live free!
    Dont let people discourage you.some forget that they did nt learn this stuff overnight.Its not a bad thing that you dont know. It is however if you dont ask. Here lately it seems to me that egos are getting in the place of camaraderie and good advice. Rember this: tell me and I may forget, show me and I may not understand, Involve me and I will learn. Go ahead and take it apart that is part of the learning process. Good luck in your endeavors and keep the wind at your back. sorry this is the best advice I can give you as im just learning to. See you round and ridz safe ridz 8) .
     
  16. Robert

    Robert Active Member

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    I am humbled by your wisdom ridz, the quote was very apropos!
     
  17. Robert

    Robert Active Member

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    Silly me, I didn't even offer help.
    Have you pulled the boot between the engine and drive shaft back yet?
    If you have the bike up on the center stand you can do this and then turn the rear wheel by hand and look, listen, and feel for any signs of trouble. I think pulling the rear wheel was a bit premature but... you have eliminated one source of noise, it will just be harder to turn the shaft now.
    For trouble-shooting, get the wheel assembly back in place and turn it all over by hand.
    Do it in neutral first. Noise? If so, your shaft and/or final drive may be the issue. If no noise is present, drop it into 1st and turn it some more. Should there be noise there, your output gearing/shaft may have issues. You mentioned that the noise starts half way down the block if I remember correctly. This throws a bit of a wrench into the soup so you may half to turn the rear end over quite a bit. The final step in today's troubleshooting excersize is to start the bike while still on the center stand and put it into gear. Chock and secure the bike's front tire to ensure it doesn't get away from you and is either directly against a wall or is pointed toward the open spaces so as not to hit anyone or anything should things get out of hand. I would run it approximately 5 or so minutes in gear. If you don't get the sound, you need to start looking at suspension.
     
  18. ridz

    ridz Member

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    Ride hard and live free!
    fox fighter please keep us updated on your situation! I for one love to hear/see the endindings..Plus the fact it completes the thread for people who could have a similar problem down the road. thanx ridz safe ridz 8)
     
  19. RickCoMatic

    RickCoMatic Well-Known Member

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    I'm pretty sure its a U-joint. An internal failure would have most-likely brought the bike to a halt ... right?

    So we hope its a U-joint and we can get Foxfighter up-and-running, again soon.

    We don't want no ... inside stuff ... to have to deal with this close to sunburns.
     
  20. Robert

    Robert Active Member

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    Good point Rick, internal failures do tend to make for very destructive stops. I do hope it is the much easier to get to joint!
     
  21. foxfighter

    foxfighter Member

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    hahahaha oh crap man i took the driveshaft out only to find a bolt had someway found its way in there and was grinding away inside. well simple fix now back to the engine.
     
  22. MiCarl

    MiCarl Active Member

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    Bolt inside the drive shaft housing? I can't imagine one finding it's way in from outside. I'd wanna find the hole that sucker came out of, it might be important.
     
  23. Ease

    Ease Member

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    Yup... I wouldn't be so quick with the "Hahahaha"
    (hahaha)

    You'd better find out where that sucker came from... unless the PO was a real prankster.

    Good Luck with it.
     
  24. RickCoMatic

    RickCoMatic Well-Known Member

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    "Oh, Louz lide chew gazz sun splaineeg da-do, Loo-cee!"
     
  25. Robert

    Robert Active Member

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    I'm with Ease, you had best ensure you don't have any holes missing a bolt in there! And if the fella before you left it in there by accident, I'd start thinking about a teardown, no telling what-all he dropped where. Your continued good health is not worth the risk. Go over the entire machine with a fine toothed comb and settle in your mind that all is well.
     
  26. foxfighter

    foxfighter Member

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    i talked to him today and he had recalled loosing a bolt and he had earlier ripped the boot off so im bootless im pretty sure i know where its from though.
     
  27. RickCoMatic

    RickCoMatic Well-Known Member

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    There was a loose bolt ... in the Driveshaft Tunnel ... on a "Bootless" bike ...

    and this bolt was "grinding" ... on something ... and the PO remembers

    ripping-off the Boot ... AND ... dropping a loose bolt ... that fell at such a

    trajectory that it entered the shaft tunnel ... where it remained ... without

    falling-out ... until that fateful night ... when you test rode the bike ... and

    heard it grinding ... and found it ... still in there ... after removing the rear

    end ... to discover it was still there.

    Don't you just hate when that happens?
     
  28. Robert

    Robert Active Member

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    Call it fate (I've another word for it but there are ladies present). You had all the luck Fox, wonder what else the P.O. failed to recall. Approach with caution.
     
  29. foxfighter

    foxfighter Member

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    its ok i trust him we fight/train together. he is a good guy. but ya funny huh. is the boot very important? oh and what kind of tires should i get if i can get this beast runnin? dunlop d404 ok? (cheap=bueno)
     
  30. Robert

    Robert Active Member

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    404 is good, 491 elite IIs better but more expensive.
     
  31. RickCoMatic

    RickCoMatic Well-Known Member

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    The Boot protects the Universal Joint and Rear Main Seal from the elements.

    The Boot protects the Rider in the event of a sudden Universal Joint Failure at High rpm.

    The Boot keeps foreign objects from entering the final drive train.
     
  32. Robert

    Robert Active Member

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    Simply put, the boot is important to the well-being of the drive shaft and associated components. Get on on there at your earliest.
     

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