2 questions about a cb350
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2 questions about a cb350

This is a discussion on 2 questions about a cb350 within the Technical forums, part of the Caferacer.net Forums category; #1 Why the hell is my motor so HOT...I mean I know they they get hot but I'm sure mine is running a bit too ...

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  1. #1
    Tim
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    2 questions about a cb350

    #1 Why the hell is my motor so HOT...I mean I know they they get hot but I'm sure mine is running a bit too hot. Oil is fine, timing is on...not sure what it could be.

    #2 Noticed a little bit of smoke coming from the breather hole on top of the valve cover. What the hell is up with that....just started yesterday. I don't have an actual breather tube attached...as i have pods.

    Thanks guys, Tim

  2. #2
    Senior Member crazypj's Avatar
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    How hot is hot?
    It will be over 220~350f around exhaust side of cylinder head, the cases will get over 175~190f.
    It's probably condensation evaporating off now weather has got a bit warmer.

    PJ
    I dabble in rocket science, when I\'m not picking my nose
    The other night I gave my girlfriend an orgasm, but, she spat it back at me

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  3. #3
    Senior Member crazypj's Avatar
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    How hot is hot?
    It will be over 220~350f around exhaust side of cylinder head, the cases will get over 175~190f.
    It's probably condensation evaporating off now weather has got a bit warmer.

    PJ
    I dabble in rocket science, when I\'m not picking my nose
    The other night I gave my girlfriend an orgasm, but, she spat it back at me

    'you can take my word for it or argue until you find out I'm right'

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  5. #4
    Tim
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    like REAL HOT...both points covers get really hot, as well as the crank cases.

    Maybe trying a different oil? Synthetic, 10w-30 as opposed to 40 weight?

  6. #5
    Tim
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    like REAL HOT...both points covers get really hot, as well as the crank cases.

    Maybe trying a different oil? Synthetic, 10w-30 as opposed to 40 weight?

  7. #6
    Senior Member Geeto67's Avatar
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    go get an infrared thermometer. I don't think they are that expensive.

    http://www.sears.com/shc/s/p_10153_1...rd=thermometer

    you can probably borrow a pro-grade one from any place that does tool rental.

    or you can go get an old fashoned meat therometer and drop it in the oil after a hard ride - much cheaper. If you are seeing 300 degrees or more in the oil then yes there is something wrong.

    typically an overheating aircooled bike will begin to "run funny", detonating and such.
    Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better.
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  8. #7
    Senior Member Geeto67's Avatar
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    go get an infrared thermometer. I don't think they are that expensive.

    http://www.sears.com/shc/s/p_10153_1...rd=thermometer

    you can probably borrow a pro-grade one from any place that does tool rental.

    or you can go get an old fashoned meat therometer and drop it in the oil after a hard ride - much cheaper. If you are seeing 300 degrees or more in the oil then yes there is something wrong.

    typically an overheating aircooled bike will begin to "run funny", detonating and such.
    Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better.
    - Samuel Beckett
    A tool is just an opportunity with a handle
    - Kevin Kelly

  9. #8
    Tim
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    I'll try it tomorrow!

    Now, what about the smoking from the valve cover where the breather tube is supposed to be?

  10. #9
    Tim
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    I'll try it tomorrow!

    Now, what about the smoking from the valve cover where the breather tube is supposed to be?

  11. #10
    Senior Member Geeto67's Avatar
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    depends on how much smoke we are talking about.
    Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better.
    - Samuel Beckett
    A tool is just an opportunity with a handle
    - Kevin Kelly

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