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What did I do now?

Discussion in 'The Garage' started by SilverTalon, May 9, 2012.

  1. SilverTalon

    SilverTalon XS400 Addict

    I've been asking for a lot of help lately, it is for a good cause.


    I took apart my carbs today to see what was wrong. One of the floats was sticking, which i resolved. I put everything back together. Now when I try to start the bike, every so often I think it starts I hear a loud clank from the engine, and then it stops/stalls.

    Now that I think about it I also fucked with the black banana looking ignition thingy
     
    Last edited: May 9, 2012
  2. bcware

    bcware Well-read Top Contributor

    Is it running or is it not running? It's hard to tell from your description. I would pull the plugs and try turning the motor over by hand.
     
  3. SilverTalon

    SilverTalon XS400 Addict

    Sorry, It's not running, will just give a loud clank at times.

    Engine turns over with kick start
     
  4. FUBAR

    FUBAR XS400 Addict

    i would just throw the banana away, its over ripe. or make some banana bread!
     
  5. SilverTalon

    SilverTalon XS400 Addict

    Thought about that for a bit.

    I remember detaching it, then just putting it back the say I found it. Is there a wrong way to re-attach it?
     
  6. bcware

    bcware Well-read Top Contributor

    Sorry, but what the hell are you talking about?
     
  7. SilverTalon

    SilverTalon XS400 Addict

    Sorry, joke from other thread.

    electronic ignition trigger
     
  8. bcware

    bcware Well-read Top Contributor

    Can you pull the stator cover off and turn the motor over using a socket or something? The kick start is too fast/forceful to provide useful information. If you turn it by hand slowly you'll be able to tell if the internal parts are bunged or making contact. It's a good thing to rule out!
     
  9. 1979XS4002-F

    1979XS4002-F XS400 Addict

    lol, sounds like someone left their "tool" on your xs my friend....

    Seriously, a banana-looking thing? Umm a coil? did it have two wires..one orange?



    ahhh an inside joke, my bad:)
     
    Last edited: May 9, 2012
  10. SilverTalon

    SilverTalon XS400 Addict

    [​IMG]
     
  11. 1979XS4002-F

    1979XS4002-F XS400 Addict

    I'm guessing here but with my points set-up as many of us have you can advance/retard your timing with the points plate...SO...I'm assuming you can rotate this as well to adjust timing..maybe your way off in timing now?
     
  12. bcware

    bcware Well-read Top Contributor

    Ignition timing shouldn't cause a loud noise, but cam timing could. This is why I suggested slowly rotating the engine by hand.
     
  13. SilverTalon

    SilverTalon XS400 Addict

    Im not arguing against doing that, just don't have time to right this second.

    If it was working before, then i took the carbs off, fixed floats, also took the timing off, put it back on, would all that cause the cam timing to go?
     
  14. 1979XS4002-F

    1979XS4002-F XS400 Addict

    No silver..it would not cause a mechanical change to the cam position..
     
  15. 1979XS4002-F

    1979XS4002-F XS400 Addict

    the only way that could happen is if your timing chain jumped a tooth or snapped...
     
  16. SilverTalon

    SilverTalon XS400 Addict

    I guess I should describe the whole issue.

    Bike was running fine, but then would loose power on the left side. Fuel was leaking from the left air filter. I replaced coils to attempted to solve the power issue. Ran a little better then starting having issue again (Issue being I could run the bike with right spark and coil alone, but not the left.

    Guy at work told me to check my contact points, which i thought I had, which led to me taking off the ignition timing and putting it back on.

    Then I read up on the forums about the fuel leaking issue. Took the carbs apart, fixed the floats to the right level (about 26mm), put them back together, and put everything back on the bike.

    Now I'm at my current point.
     
  17. bcware

    bcware Well-read Top Contributor

    Yeah, I didn't know everything was fine before. Loud noises would make me double check just to be sure.

    Ok, ok, ok... you took the timing thingermabob off the cam? Did you line up the small "dowel" protrusion with the recess in the timing thing? If it isn't seated in its home it's not going to be happy and might make a clank as it passes by the recess.
     
  18. 1979XS4002-F

    1979XS4002-F XS400 Addict

    I'd take the advice above considering nothing you did should have broke anything internal from a mechanical standpoint... That is, roll the enginge over by hand...also a compression test might help identify broken/lodged rings somewhere...
     
  19. FUBAR

    FUBAR XS400 Addict

    theres only one way that banana thinger majegerr goes back one and it looks correct to me. lol

    it doesnt spin like the points system , i would say bc may be right, if its not turning over smoothly right now you may have busted a tooth or the chain is loose.


    maybe it was the the luck of the draw somthing else broke or is worn out and you happened to tinker with the carbs during that time
     
  20. SilverTalon

    SilverTalon XS400 Addict

    bcware for the win!

    Opened up the timining and unbolted it. As you said, it was not seated correctly. Put it in right, bolted back in, and started up with no issue.

    Now, as i wanted to make sure, I turned it off and on a few times (which is probably bad enough). But if I use the electrical start it will now clank, but turn on. Kick start turns on no issue, instantly.
     

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