KymcoForum.com
Scooters - 50cc => Super 9 => Topic started by: Flyer23 on April 04, 2022, 09:36:23 PM
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Good evening. Is there a mechanical fuel shut off valve that will fit the fuel tank so I can get rid of the vacuum valve? I think it's sticking and under load the carb is running out of fuel at high RPM. It then bogs down and stalls. It will restart after a few minutes but it seems to me there is no fuel as when you crack the throttle it just bogs down when trying to ride. Yet several times it has seems ok and that's what makes me think that valve is sticking because the NEW fuel filter looks like there is only a small amount of fuel in it. I would think if fuel was flowing properly and the carb was not running out of fuel the filter would look pretty full, no ? Fuel filter is new and carb is also new. Thank in advance,
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Vacuum valve sticking produces the same symptoms....
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It depends on your machine. Some have steel tanks with threaded couplings, but for the last 20 years most have nylon fuel tanks with press-fit couplers with o-rings. These are harder to modify like you're describing because you can't thread in a new valve.
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It depends on your machine. Some have steel tanks with threaded couplings, but for the last 20 years most have nylon fuel tanks with press-fit couplers with o-rings. These are harder to modify like you're describing because you can't thread in a new valve.
Machine is a 2005 Kymco Super 9
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I have had the occasional vacuum fuel valve failure. In the case of an Agility I was able to match up an economical non-OEM vacuum style replacement. I would first disconnect the fuel line from the carb and put a draw (like using a straw) on the vacuum line to test the flow of fuel through the fuel valve into a jar. A fresh new vacuum hose is also an inexpensive place to start - and not a bad idea on an older scooter.
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Machine is a 2005 Kymco Super 9
I didn't mean to suggest that I know every Kymco fuel system, so I don't know what a 19-yr old Super 9 has in the way of a fuel tank.
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Does anyone know where I might find a manual fuel tank valve? I can't find anything.
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Does anyone know where I might find a manual fuel tank valve? I can't find anything.
Hardware stores like Ace, Lowe's, Home Despot have brass petcocks that could be adapted. Motorcycle salvage yards probably have fuel tanks with manual valves.
Are you sure it is not the vacuum operated fuel tank vent valve that is sticking? It will produce the same symptoms.
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Hardware stores like Ace, Lowe's, Home Despot have brass petcocks that could be adapted. Motorcycle salvage yards probably have fuel tanks with manual valves.
Are you sure it is not the vacuum operated fuel tank vent valve that is sticking? It will produce the same symptoms.
Ah yes I was able to remove a vacuum valve from the tank, but it looked like it went to the carb. That's the valve I'm try to get rid of and just use a manual valve to leave open all the time since you can't get to it easy. Then put a second petcock after the fuel filter so I can shut the fuel off and on
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Ever find a manual shut off that fit? Was thinking of doing the thing in my current build. Not having the same issue but would rather have no vacuum to worry about.
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Ever find a manual shut off that fit? Was thinking of doing the thing in my current build. Not having the same issue but would rather have no vacuum to worry about.
Racingplanetusa.com
fuel tap 15mm vacuum to manual conversion for Aprilia, Kymco, Piaggio, Rieju
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Racingplanetusa.com
fuel tap 15mm vacuum to manual conversion for Aprilia, Kymco, Piaggio, Rieju
Sweet! I will have to grab one and try it out.
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Sweet! I will have to grab one and try it out.
https://www.racingplanetusa.com/fuel-15mm-vacuum-manual-conversion-aprilia-kymco-piaggio-rieju-p-215118-1.html?backcPathco=295&cPath=2_24#.Yu2AT0fMKUk