Why does my bike carburetor overflow?
It means that the needle valve in the fuel bowel is stuck in the open position. Usually the gasoline fills the carburetor bowl up to a certain level and then the carburetor float will lift the needle and close the valve so no more fuel will come in.
What causes carburetor overflow?
When the tip of the valve becomes worn or debris prevents the closing of the valve, fuel flows continuously into the bowl thus flooding the engine. Under severe conditions gas may soak the air filter or overflow out of the carburetor and onto the ground while parked.
How do you fix an overflow on a bike?
Most of the time tapping on the carburetor (softly) with a wrench will free it up. The carburetor contains a float pin which basically controls the overflow of petrol in the bike. If the float pin is not fixed properly, overflow of petrol takes place.
What causes a motorcycle engine to not start?
Poor starting is often caused by a dirty or faulty spark plug, particularly on older 2-strokes. As this is one of the easiest checks, the mechanic should remove the plug and carry out a spark test by laying the plug onto the cylinder head then turning the engine over with the ignition on.
What happens when you run the starting fluid on a motorcycle?
When the engine fires the starting fluid, it will also draw the gas right through the fuel system. However, if the bike continues dying even after you’ve run the starting fluid, consider other problem areas. Remember, even starting fluid won’t lubricate all the cylinders properly – particularly after extended use.
Why does my motorcycle not start with a cracked spark plug?
When a cracked spark plug is installed, the spark will find the least path of resistance through the crack and ground out to your engine block instead of going all the way down to the end of the spark plug and jumping across the gap like it’s supposed to.
What does it mean when your bike won’t start?
Has fuel, battery was enough to turn starter which usually means there’s enough to fire the ignition if bump-started, spark plug lead is firmly connected, compression seems to exist from the rhythm of the starter and how the rear wheel locked if bumped on the slightly loose surface outside the garage in too low a gear…
Why does my motorcycle engine not start up?
A loose or broken vacuum line might cause too much air to be drawn into the bike’s combustion chamber. This will, inadvertently, alter the mixture of air and fuel. As a result, your engine won’t be able to ignite the mixture well.
When the engine fires the starting fluid, it will also draw the gas right through the fuel system. However, if the bike continues dying even after you’ve run the starting fluid, consider other problem areas. Remember, even starting fluid won’t lubricate all the cylinders properly – particularly after extended use.
When to drain and replace a motorcycle engine?
To expand on xpda’s answer, and genericise it for any engine that has been standing for some time: Drain and replace the fuel – modern unleaded goes off after a couple of months so won’t be any good if it has been standing for longer than that.
Why is gas coming out of the overflow tube?
When the fuel is turned on gas starts coming out of the overflow tube. It doesn’t matter if the engine is running or not. The bike will start and run like there is nothing wrong. But, the gas is dripping severly out of that tube. The bike is a 2001 Yamaha YZ 125, we bought it used about 5 months ago and have no idea how many hours are on it.