Just a few questions...

Discussion in 'Motorized Bicycle General Discussion' started by Rmerac, Sep 26, 2011.

  1. Rmerac

    Rmerac New Member

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    First off, for those who have been keeping up with my other posts about my little "Red Baron" :D
    [​IMG]
    ... it's been running great the past few days.

    However, I noticed some black liquid running down underneath my bike frame. What is this? because the only liquid that goes in my motor is greenish blue.

    Also, my motor seems to shut off automatically whenever I pull in the clutch and am not holding the throttle enough to keep it running. The kill switch at this point seems useless.

    So, my questions are... what is this black liquid leaking down under my frame and how do I stop the leaking? And.. should I worry that my bike is unable to idle, if so, how do I make it to where it idles on it's own rather than me having to hit the throttle?

    Thanks in advance guys! (You guys are a lot of help by the way!)
     
  2. killercanuck

    killercanuck New Member

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    Heya, sorry I haven't kept up with your build. (sweet looking bike btw!)

    That black goop is half burnt oil building up in your pipe. It's normal for running on 'break-in' mix. I'd triple check your exhaust gasket for leaks if its getting all over your frame...

    For your idle, just turn in the idle screw until it doesn't die on you. You might need to take a little more slack out of your clutch cable, if it barely catches it will kill the motor at idle speed.

    Best of luck!
     
  3. Rmerac

    Rmerac New Member

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    My English 101 Professor is an experienced Harley owner/rider. Although I realize the big difference between a Harley Davidson motorcycle, and a Motorized 66cc Bicycle.. he said that if I'm at 16:1 currently and excess oil is leaking then maybe I should consider going a bit more lenient on the oil to 12:1 or so.. would this be recommended by anyone else?
     
  4. Ilikeabikea

    Ilikeabikea Moderator
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    32:1 is the common fuel oil ratio after break in. I would think going 12:1 would make it worse....
     
  5. Rmerac

    Rmerac New Member

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    Yeah, see, that's what I was thinking also. I think what he was getting at is that the less oil you have in the mixture, the less excess oil you'll have dripping out. I don't think he took into consideration the aspect of the break-in period, (although I failed to tell him that), and that it is only a 66cc not a Harley, therefore fuel and what not would be pretty different.
     
  6. 2door

    2door Moderator
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    When looking at the ratio of oil to gasoline, the larger number represents the gasoline, the smaller the oil.
    A 24:1 ratio, which we recommend for break in, means 24 parts gasoline to 1 part oil. Your Harley riding prof is mistaken about the 12:1 recommendation. That will be way too much oil and will cause you more problems than a little "black goo".
    Your carburetor should have an idle speed screw to set/adjust the idle speed. Try that, as was suggested above.
    Tom
     
  7. Allen_Wrench

    Allen_Wrench Resident Mad Scientist

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    Nice bike, BTW. :)
     
  8. Rmerac

    Rmerac New Member

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    It now idles. Thanks! And the black liquid is still visible but I still don't see it's source. I think it's fine for now, because I just had a couple drops on my shed's floor when I got back from being out of town over the weekend. 2-3 days of sitting there, and only a couple drops from a leak.. I wouldn't say that's very bad..
     

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