Question about Honda Spacy 100 Motorcycles

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Stalling/hesitating during acceleration

Hi, i have a honda @ 125 scooter, automatic. ive been having trouble with it recently, and no one can seem to help me, occasionally its starting to hesitate just as i start to accelerate, there could be a 1 - 2 seconds when no spark, and feels like it will stall, then off she goes, this carries on for a while, sometimes if im just about to accelerate and have to break suddenly the bike stalls and wont start again. the problem occurs consistently when i go over bumpy roads or up steep inclines. once it has stalled comepletely, it will start to idle but soon as i accelerate it stalls again, it idles rough at that point. if i walk away and leave it for an hour or two then come back it`ll start straight away and be fine till later on. its not running hot, ive had 4 mechanics look at it and they seem content to change the spark plug and it starts and runs so they think their job is done when a day later i`ll be on the side of the road again....its frustrating the hell out of me....any ideas what could cause this?

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Remove the water trap bowl at the bottom of the petcock, (gas valve). Any water or trash in the bowl? Drain a cup of gas from the tank. 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 two screws on the outside throat of the carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they 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. If not, then remove the slide from the carb and move the clip on the jet needle one notch lower.

Please rate this solution. Thanks hanoidan2005!

Posted on Apr 15, 2009

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Posted on Jan 02, 2017

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