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#1 sounds like a fuel delivery system issue. Make sure the fuel tank flows freely to the carb. (remove the fuel line from the carb--from the gas tank and turn on the petcock--gas should flow freely) The needle and seat may need to be cleaned or replaced, this controls the flow of gas into the float bowl of the carb.(remove the drain screw from the bottom of the carb (with everything properly assembled- petcock on)..gas should continually flow through the bottom of the carb --10-15 seconds of continual gas flow will make sure its flowing properly! Both of these sound like a solution to your problem.
Try taking the float bowl off and clean out the orfus. It will eather be in the nut holding the bowl on or in the end (sides) of the pickup tub the nut scews on.
time to pull the hose off the fuel pump coming from the tank and drain the tank and check flow of gas coming from tank hose, and possibly inline fuel filter is plugged or there is junk in your tank/line from tank not letting enough fuel to run to pump so pump can pump it to carb !
the problem is with the carb. not able to keep enough fuel going into the float bowl to support engine staying running. could be hose off gas tank clogged or petcock, coud be main jet sticking closed or float level out of adjsutment.
Sounds like contamination has set into the fuel shutoff valve on the bottom of the fuel tank, or the fuel cap vent hole is plugged. Test the fuel line that comes from the fuel tank. First turn the valve off, disconnect the fuel line that feeds the carb, insert the fuel line into clear small container, then open the fuel valve to the on position and look for fuel flow,now turn the valve to the reserve position and check again for fuel flow. If these test fail to yield fuel try the procedure again this time with the fuel tank cap loosened and check for fuel flow. If in both tests the fuel fails to flow then the problem can be isolated to the fuel valve/tank outlets or the fuel line to the carb.
Drain the carb with the gas valve on the tank turned off. Now turn the valve back on and see if gas again begins to flow out of the float bowl. If no gas drains with the valve open then remove the fuel line at the carb and check to see that fuel flows freely through the fuel line. If gas flows freely out of the fuel line then the float needle is stuck closed or trash is plugging up the needle jet assembly. If so, remove the float bowl and free up the needle. Use spray carb cleaner and the little "straw" that comes with the can to direct the spray into the float needle fitting. Fuel should flow when the float is down and stop flowing when the float is lifted. Pull a spark plug and ground the metal against the cylinder. Check for spark. If there is no spark then check the operation of the kill switch on the side stand and the handlebar. Use a multimeter to check the switches. Get fresh gas and install an in-line fuel filter to keep any trash out of the carb. Clean the air filter. Please rate my answer. Thanks.
You will need to remove and clean the carb. When you run one out of fuel it allows all the trash in the tank to go into the carb. The fuel leaking from the overflow is trash in the float needle and needs to be cleaned.
Did you check fuel tank and feed line to carburetor for dirt/obstructions? Screen inside tank at fuel line connection may be plugged. Pull feed line off at carburetor and see what kind of flow your getting from the tank. I will assume you checked fuel inlet port of carb when you had it off to clean.
If it is starting and not continuing to run it still sounds as though something is blocking the fuel flow. If the carb has been cleaned out, literally torn down and the needles cleaned so that no small debris is clogging them, check the fuel tank and lines for anything that could be restricting the flow to the engine. Remember that it's recommended that you replace the fuel line (cheap fix) when you dismantle the carb. Removing the line breaks off small pieces of the rubber in a worn line, which can re-block a freshly cleaned carb.
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