Carb leaking gas out the overflow port 2003 Artic Cat 400. Sometimes gas will drip to almost steady flow out of the port in the bottom of the carb bowl. Ive taken the carb apart and bent the float, but still, from time to time, gas pours or just drips out. Any ideas?
Most carb problems occur when the bike is stored or let sit long periods of time with gas in the carb. The gas eventually varnishes the inside of the carb and blocks jets and passageways but if this has happened Seafoam isn't an aggressive enough cleaner to fix the problem and the carb will usually need dismantled and soaked in a stronger parts ...
As noted above any check valve becomes a nightmare as gas expands in the heat, builds fuel pressure in the tank and that sinks the float in the carb, floods the engine. Dirt bike guys very commonly have problems here as they like to add a check valves so the vent does not slobber gas on a steep down hill, then they go up a steep hill, engine ...
There is no off position on the petcock valve to stop the gas from going to the carb if the bike is off.if the needle valve is not seated or floats need to be adjusted it will leak out the nipple on the bottom of the carb.if the bike runs fine it probably won't leak when it's running because the engine is using the gas.simply get a $3 on/off valve at auto zone and put it on the gas line in ...
Hi guys. My nephews little 50cc 2 stroke dirt bike has a problem. When the petrol tap is turned on, fuel constantly but slowly (ish) leaks from the little clear pipe under the carb (Im guessing thats the overflow?) The bike can still be used if you ignore this but the petrol obviously doesnt last long as its constantly seeping out the pipe.
Better yet, simply empty the tank and let the bike run out of gas. You could also drain the carburetor out via the machine screw at the base of the carburetor float chamber. Fill up your gas tank and check for any leaks. Leaks typically occur where the fuel line connects to a fitting using a press fit system.
As soon as I turn my gas on, the bike leaks gas from the overflow tubes. I try and treat it good and run VP 110, but each time it leaks for a few seconds I just count $2, $4, $6—eek! For what it's worth, on the rebuild I did pull the throttle slide stop block and clean under that.
A rough idle condition is usually caused by an overly lean fuel mixture that results in lean misfire. A common cause of idle problems is air leaks between the carburetor and intake manifold (tighten the carburetor base bolts or replace the gasket under the carburetor), air leaks in vacuum lines or the PCV system or EGR valve.
Verify it's open. The usual indicator is either a pressure release when you open the gas cap, or a vacuum "sucking" noise when opening it first thing in the morning. On a carb equipped bike, the carb overflow lines will leak, but in a fuel injected bike like yours, it'll be out the overflow vent. The next time it begins leaking, open the gas cap.
The most common places a motorcycle leaks gas are the fuel petcock, the carburetor, holes in the gas tank, and the fuel injector. It's important to promptly take care of a motorcycle gas leak. Gas leaks can lead to exposure to toxic fumes, gas on your clothes, wasted money, and further wear and tear on your motorcycle.
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2. Inlet system air leak. 3. Restricted fuel tank vent system. 4. Dirty or damaged air cleaner element. 5. Enrichener valve not seated or leaking. 6. Restricted fuel supply tract. 7. Plugged bowl vent or overflow. 8. Loose or plugged fuel and air jets or passages. 9. Worn or damaged needle or needle jet. 10. Vacuum piston assembly malfunction. 11.