Carb Issues? Please help!
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Carb Issues? Please help!

This is a discussion on Carb Issues? Please help! within the Technical forums, part of the Caferacer.net Forums category; I know this is a heavily covered issue but I dont have much access to the internet right and was hoping for an answer by ...

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  1. #1
    Senior Member ZouLou's Avatar
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    Carb Issues? Please help!

    I know this is a heavily covered issue but I dont have much access to the internet right and was hoping for an answer by tomorrow. It is on a '77 XS650 (my dad's bike). It had an issue and was draining gas out of what looked to be the float bowl so I swapped his carbs out for my old ones ('79 XS650) today and took it for a spin. It seem to work great. I then let him go for a ride but he accidently kicked it into 1st from neutral without the clutch and killed it (he was pretty excited and just didnt realize he didnt have the clutch in haha). When we tried to get it started again it was draining gas through the air filter. What could cause this? I mean it ran parfect for me then killed it then carb is free flowing? I mean this may have been the problem before as when I removed the filters to replace the carbs there was some gas in them as well. Any help would be awesome. Thanks a lot guys.
    1979 Yamaha XS650 Special
    https://www.caferacer.net/forum/topic.asp?TOPIC_ID=12991

  2. #2
    buckandaquarter's Avatar
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    Stuck float or a piece of trash in the float needle.

  3. #3
    buckandaquarter's Avatar
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    Stuck float or a piece of trash in the float needle.

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  5. #4
    Senior Member ZouLou's Avatar
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    Could that be caused by killing it? Also opened up the old carbs and the floats weren't stuck at all.
    1979 Yamaha XS650 Special
    https://www.caferacer.net/forum/topic.asp?TOPIC_ID=12991

  6. #5
    Senior Member ZouLou's Avatar
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    Could that be caused by killing it? Also opened up the old carbs and the floats weren't stuck at all.
    1979 Yamaha XS650 Special
    https://www.caferacer.net/forum/topic.asp?TOPIC_ID=12991

  7. #6
    buckandaquarter's Avatar
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    Nope. They will only flood if the float needles don't seat properly. Do you know how to st them up?

  8. #7
    buckandaquarter's Avatar
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    Nope. They will only flood if the float needles don't seat properly. Do you know how to st them up?

  9. #8
    Senior Member ZouLou's Avatar
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    Yea I actually just rebuilt the carbs and replaced the float needles is there anything special about putting them in I need to know?
    1979 Yamaha XS650 Special
    https://www.caferacer.net/forum/topic.asp?TOPIC_ID=12991

  10. #9
    Senior Member ZouLou's Avatar
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    Yea I actually just rebuilt the carbs and replaced the float needles is there anything special about putting them in I need to know?
    1979 Yamaha XS650 Special
    https://www.caferacer.net/forum/topic.asp?TOPIC_ID=12991

  11. #10
    Senior Member txchainsawgogi's Avatar
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    the drain tubes could be severely corroded... i think its what theyre called...the protrusions on the bowls that go up into the carb body. that or the float needles.

    sometimes the rubber gaskets the needles seat into are shot.

    gas is so thin that it seeps out of even the tiniest gap.
    honk if youre horny.

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