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The float may be stuck. Has it been sitting for awhile?. Gas gets old and gums everything up. Any engine that gets used sesonaly like lawn mowers , boats, generators, ect should have the carb cleaned every year so it can mix fuel correctly. Fuel stabilizer can reduce the frequency this needs to be done if used right.
just like a car before the car start the fuel pump shoots gas in the carb or a lawnmower you gotta prime it all the gas that was in the carbs when you shut them motors off has done evaporated check your fuel cells see if there is a hand pump to prime the carbs unless its electric fuel pumps either way them carbs have to be primed
From the info you provided, it seems like it is not getting constant supply of fuel. I think that don't have a carburator. It has a TBI(Throttle Body Injector. You should hear a faint humming noise at the back coming from within the fuel tank when you turn the key on. Thats the fuel pump. Your fuel pump may have gone out.
Lets start with the basics. Is the gas valve turned on? Do you have plenty of gas in the tank. If not, turn the gas valve to the "reserve" position if your valve has a reserve setting. There may be a water trap bowl at the base of the gas valve. Turn the valve off and remove the bowl if you have one and then clean and replace it.
Next, drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine.
If the bike doesn't start after a couple of minutes then shut off the gas and remove the carburetor.
Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray all the little airways and fittings in the carb. Remove the two screws on the outside of the carb and spray into the screw holes as well.
Be sure to put each screw back in the hole it came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. This process should get you back on the road.
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Sam so right now you have crank no start,or no crank , no start. Not clear.
If its no crank no start.Your looking at battery, cables, ignition switch , starter relay.
If its crank no start, you know that B+ is making it to starter. Ok now listen for fuel pump to buzz or hum when you put key in ignition and turn to on position. No buzzing or humming fuel pump or relay.
make a set of jumper cables run them from battery to fuel pump, Does the pump run? If yes. The pump is good relay is not. If pump doesn't run then its the pump. Remember when you do this test you don't need the key in ignition Battery doesn't have to be connected, because your bypassing the control circuit.
yes its posible that the pump is geting week or your fuel could have water in it to i would start and put some fuel antifreez in it then have your fuel presser checked
Prime the carb and see if it starts for about 3 seconds. If you can manually get it to start, the problem is in the fuel line most likely the fuel pump that is in the gas tank. The fuel filters do not just plug up without notice but the fuel pump will go in a micro second. Here is a tip...........always always always keep a 1/4 tank of gas or more in the gas tank. The fuel pump inside the gas tank stays cool due to the fact that the gas cools it. This helps extend the life of electronic fuel pump.
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