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Post by hurldem13 on Jan 9, 2018 9:53:38 GMT -5
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Post by ThomasTPFL on Jan 9, 2018 9:57:02 GMT -5
I'd clean it up real good so you can get a better idea of what it is and where it's coming from. In that area its most likely fuel or oil coming out of the breather tube that comes off the valve cover.
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Post by hurldem13 on Jan 9, 2018 10:21:55 GMT -5
I'd clean it up real good so you can get a better idea of what it is and where it's coming from. In that area its most likely fuel or oil coming out of the breather tube that comes off the valve cover. I was thinking something like that ... Is it a hard fix or do i just need to tighten up hose clamps and such ... |
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Post by jackrides on Jan 9, 2018 12:03:14 GMT -5
Probably easy. Clean it good, find exact source, and if it is gas or oil. How is the crankcase oil level? Scoot on center stand; Unscrew and clean DIPstick; dip (not screw) it and check the oil level.
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Post by GrumpyUnk on Jan 10, 2018 14:46:08 GMT -5
If it was fuel, it likely would evaporate and leave behind a slight film that would not hold onto much road dust or dirt. Oil will hold onto a lot more 'stuff'. If you can wipe it off with a paper towel, and it leaves no residue or discoloration, it's likely oil. Fuel residue seems to need a solvent of some kind to remove.
The crankcase vent could be the source. Follow the vent tube from the top of the cam/rocker cover and see where it goes. You can add a length of tubing and run it up near the fuel tank to vent, but keep liquids and condensed vapors inside the tube, and they'll run back into the crankcase, while letting true vapors escape out the end.
You might run your fingers under the bottom of the carburetor, mostly the float bowl, but the accelerator pump is also a possible point of leakage. Feel for drops or wet spots, and if you find them, examine what is left on your fingers. If it's oily, check for leaks from the case split seam or the rocker cover or as above, the vent. If it is thicker than fuel, but not oil, it could be condensed fuel that has 'concentrated' forming a thicker substance. Then it could be the float, accelrator pump, bowl vent, or, most leaky, a leaking float valve or vacuum fuel cock that has seepage problems. With the engine off, the fuel should not flow from the tank to the carb inlet. Only with vacuum applied to the bottom connector should fuel flow. Bottom being for a tank mounted valve, otherwise inspect to determine. The fuel will flow through the line leading to the carb, not the line leading to the intake manifold.
tom
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Post by scooterpimp on Jan 10, 2018 18:30:27 GMT -5
Sometimes fuel can emerge from carb bowl vents if needle doesnt seat. If you see something fairly wet try flicking the vent tubes & see if they drip. Sometimes bowl drain screws wont seat too well either. Or check air filter box for oily residue inside like from case vent. Just tossin ideas out there. I agree with the clean area & recheck.
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