When slowing down and coming to a halt the Gilera 125 engine cuts out. The only way to keep engine running is to increase the revs and put the brakes on, not a very satisfactory solution. The bike has been serviced and the problem tackled by dealer but no solution was found
ALWAYS have a fire extinguisher at hand when working on carburetors.
Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).
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 and run properly then shut off the gas and remove the carburetor from the engine.
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 into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the carb and spray into the screw holes as well.
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Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward. Before putting the slides back in the throat of the carbs, Move the clip on the jet needle one notch lower. 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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When the bike is stopped in traffic whether after a short run or a long run, unless the engine revs are raised the engine will cut out. Emediately the button is pressed to restart, the engine restarts as normal and the engine ticks over.
carb problem. Clean it or rebuild it and adjust the fuel/air ratio
hi, I have the same problem but i can not find out what is wrong with it. it also is worse in the rain and i changed the ignition coil and still the same. i then sprayed wd40 in the spark plug cap and it works better but still cuts out when it ticks over. can anyone help. much appreciated
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