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Bike throwing up!

Discussion in 'Technical' started by TapioK, Feb 1, 2018.

  1. john sachs

    john sachs Active Member

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    Do you still have the front head hose barb connected to the intake manifold ? If so that can cause the problem you have.
    The 1 way valve (black & white valve in line)on the hose of the rear head is very easy to check if it's working. Blow through 1 end, and then the other end. You should be able to get air out of a 1 end only. I've never seen one that was bad yet.
    John
     
  2. SMCT

    SMCT Active Member

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    Too much oil in the engine. Most likely it was over filled.
     
  3. SMCT

    SMCT Active Member

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    It is very, very easy to over fill these engines, and that's due to 2 inherent issues. The first is the thick oil and checking the oil level when it's not fully heat soaked. The second being the weak scavenge side of the oil pump. Due to the inherent flaws of these engines, the best way for accuracy on oil amount, is to completely drain the system dry, then put in 2 3/4 quarts total. If you check these engines idling and on the kick stand, you highly run the risk of over filling, because at idle, the scavenge side of the pump and gear rpms is not enough to put the oil back in the tank. You actually should raise the idle (off idle) so that the scavenge side starts to put it back into the tank, then you can check it. So, in a case such as described herein this topic, if the bike is idling and on it's kickstand, the majority of the oil can be sitting in the crankcase, giving the end user a false sense that his engine is low on oil. So, oil then is added, and then on a ride with engine rpms above idle it goes back into the tank at a higher level, but it doesn't puke it at that point. The point it pukes it, is when it's back at idle (now all of the oil and excess is in the crankcase) then off idle and moving not giving it enough time to get back into the tank, the oil runs up the jugs, and pukes it into the over flow tube, of which should never be hooked into the air cleaner because then all that oil gets sucked up in through the carb and burned and the rest just pours all over the side of the bike. The oil that gets sucked up into the carb and burned in the chamber will emit white smoke.
     
  4. TapioK

    TapioK Well-Known Member
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    That is one option, I was busy and lazy and did let a shop change fluids... I have changed my oils there my self before and didn’t even think the mechanic didn’t remember or know the correct amount... well, I’ll see
     
  5. BigDogRick

    BigDogRick Active Member
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    Been there several times. I hate to see a trip interrupted by something five minutes and a turkey baster can solve.


    Sent from my iPhone using Tapatalk Pro
     
  6. TapioK

    TapioK Well-Known Member
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    Yep. Should I just block the manifold and route the front head hose to ground?
     
  7. john sachs

    john sachs Active Member

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    No.
    Call me, and I'll tell you what to do if that's your problem.
    John
     
  8. Ribs

    Ribs Live Free & Ride Hard

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    No one is mentioning the wrong oil filter.

    Did you just change out the oil filter?

    My guess is the wrong one was put back in. Looks the same thou.

    If you look into the top of your old oil filter and see no black rubber seal inside the filter behind the little holes.

    Now check the filter you have on now
    And it has the black rubber your using the wrong filter.
    And it causes crank case pressure which will blow oil out your breather tube.

    The oil is suppose to flow back into the reservoir.

    And that black rubber is blocking it and causing your problem.


    If your oil return lines are outside your engine.
    The oil is used then filtered. Our the other way around.

    If your oil return lines are internal then
    The oil filtered then used.

    And that determines which oil filter you need too use.

    I will get a photo and post to show
    the difference.
    Tomorrow
    Got to sleep now.

    Also your number two cylinder may have allot of oil in it remove plug and turn it over too clear the oil.
    Clean it out with a little fuel

    Ribs






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  9. TapioK

    TapioK Well-Known Member
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    So, I’m back home and the cause is coming clear.... reed valve for breather was broken ! piece of it (most likely) found its way to oil pump and caused a ”little” problem....
    [​IMG][​IMG]
    What in earth broke the valve is a mystery, or maybe the whole sequence was other way around ...
     
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  10. BWG56

    BWG56 Guru

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    Dat sux:oldbang:
     
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  11. Mickeetwo

    Mickeetwo Guru
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    Wow....sorry to hear that Tapio
     
  12. Ribs

    Ribs Live Free & Ride Hard

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    Dang.


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  13. Th3InfamousI

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    Your oil shaft looks broken too? Or did you cut it?

    How's the rest of your crank case?

    I replaced my oil pump because that damn shaft snapped as the woodruff key got stuck and welded itself into the gear. I replaced it with an ultima it's half the price as the S&S and hell I actually get better oil pressure numbers with the ultima High Flow pump than the stock S&S. It looks a little different but hell you can't see it! And now that your this deep in the oil pump you'll come to the same conclusion it's just a piece of aluminum can't be anything different between ultima and s&s then the price.

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    #33 Th3InfamousI, Feb 16, 2018
    Last edited: Feb 16, 2018
  14. TapioK

    TapioK Well-Known Member
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    The shaft needed to be cut... not sure if I go Ultima or S&S , maybe S&S
     
  15. Big Daddy 72

    Big Daddy 72 Custom Street Rod Interiors & Design

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    Ouch! Hate that for ya buddy! Damn Mechanical Stuff!!!!:mad:
     

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