Post by dcustriker on Oct 22, 2014 11:56:45 GMT -5
So I had this problem before and which eventually led to me changing out the carburetor since it eventually would not run. (See Priming the Carburetor on page 2 or 3).
With a brand new carburetor, the scooter is finally firing up and running. However, the original problem is still happening. The scooter dies at the exact same locations on a road going about 45-50 mph. However, at night time, there is no problem at all. The scooter only dies when I am riding. I can put the scooter on the center kickstand and rev it all I want without any issue (except for one time my spark plug boot came loose, of which I thought may have been the issue, but apparently not). Here's a few things I've noticed:
1.) Adjusting the carb is quite difficult. I can hear no changes in the RPMs as I turn the Air/Fuel mixture screw. However, I do notice at times that the rear tire begins moving when changing the ratio. I went by the speed of the wheel when adjusting.
2.) I've rode the scooter on the same road with different settings (Air/Fuel). The scooter continues to die in the exact locations.
3.) The new carburetor starts up much better after shutdown than the older one, which used to take 10-15 seconds of cranking.
4.) After the first shutdown yesterday, I reduced my speed to 40 mph. I noticed it having hesitations around the same point it usually does. It eventually caught back up and went a little further before it shutdown again.
5.) I currently have the carburetor set around 2 full turns counter clockwise from being all the way in. I feel as if the scooter is going through gas quicker than it should, however thats hard to tell since I've not been able to get through a tank of gas without any issues yet.
6.) I have searched and searched for vacuum leaks, but have found nothing.
I was wondering if any of you had any input in this. I'm concerned that whatever issue I am having originally screwed my initial carburetor. I didn't dig into it since the screw heads were cut off from the factory and just replaced it with a new one. I am changing the CDI box and Ignition coil as soon as they come in the mail. Could this be a spark issue? I have noticed a rust spot on the spark plug boot, and it did come loose while revving up the engine. The spark plug is also difficult to actually get it to fit tightly on the plug. I'm just not sure if the temperature would have much of an impact on that though (although there is more moisture in the air at night as I come out to a scooter with condensation gathered on it). Second thought was valve adjustment and perhaps the pulses were not getting enough fuel to the carb bowls, but i'm not sure if I would see an increase in gas consumption then (If I am having an increase that is).
With a brand new carburetor, the scooter is finally firing up and running. However, the original problem is still happening. The scooter dies at the exact same locations on a road going about 45-50 mph. However, at night time, there is no problem at all. The scooter only dies when I am riding. I can put the scooter on the center kickstand and rev it all I want without any issue (except for one time my spark plug boot came loose, of which I thought may have been the issue, but apparently not). Here's a few things I've noticed:
1.) Adjusting the carb is quite difficult. I can hear no changes in the RPMs as I turn the Air/Fuel mixture screw. However, I do notice at times that the rear tire begins moving when changing the ratio. I went by the speed of the wheel when adjusting.
2.) I've rode the scooter on the same road with different settings (Air/Fuel). The scooter continues to die in the exact locations.
3.) The new carburetor starts up much better after shutdown than the older one, which used to take 10-15 seconds of cranking.
4.) After the first shutdown yesterday, I reduced my speed to 40 mph. I noticed it having hesitations around the same point it usually does. It eventually caught back up and went a little further before it shutdown again.
5.) I currently have the carburetor set around 2 full turns counter clockwise from being all the way in. I feel as if the scooter is going through gas quicker than it should, however thats hard to tell since I've not been able to get through a tank of gas without any issues yet.
6.) I have searched and searched for vacuum leaks, but have found nothing.
I was wondering if any of you had any input in this. I'm concerned that whatever issue I am having originally screwed my initial carburetor. I didn't dig into it since the screw heads were cut off from the factory and just replaced it with a new one. I am changing the CDI box and Ignition coil as soon as they come in the mail. Could this be a spark issue? I have noticed a rust spot on the spark plug boot, and it did come loose while revving up the engine. The spark plug is also difficult to actually get it to fit tightly on the plug. I'm just not sure if the temperature would have much of an impact on that though (although there is more moisture in the air at night as I come out to a scooter with condensation gathered on it). Second thought was valve adjustment and perhaps the pulses were not getting enough fuel to the carb bowls, but i'm not sure if I would see an increase in gas consumption then (If I am having an increase that is).
..BAD TO THE BONE..
This would explain why so many of us have problems running at wide open throttle, with our vacuum powered fuel pumps, where the engine is starved for fuel. The engine literally runs out of gas. It's very important to have a good working pump and no vacuum leaks.)