scooter dies when i stop

[lostintexas08]

Hey guys new to this forum thing and new to a scooter i have a 2008 axon 50cc 4 stroke single cylinder and i changed the plug tore apart carb and cleaned then cleaned air filter ive been trying to dial in the carb but having problems now it seems to start fine and idle fine but when i go at first its fine but if im on the throotle for a couple blocks then come to stop sign it wants to die when i stop then when i take of it hesitates and loses a tremendous amount of powercould it be something else what should i do please help this my only way around

[lostintexas08]

thanks

[harrywr2]

Adjust your valve gaps procedure is in the 'hot to' thread in the 50cc section.

Stalling at stops is almost almost always valve gap

[als01seville]

Its running to lean. The tell tell sign is after it gets hot is when you have the problem. Thats why it idles good and runs good when you start it because the choke is helping to get more fuel in. Once your choke is off and you are cranking it is overheating because of the lean mixture.
Turn the Air/fuel mixture Counter Clockwise about 1/8 turn and listen if your rpms go up. If they go up turn it another 1/8 keep doing this until the Rpms Drop then Turn it Clockwise 1/8 turn and it should be where it should be. Then you might have to turn the IDLE screw Counter Clockwise to lower your Idle.

If its to Rich it will sputter at low throttle when you try to give it gas to get up and go. In that case you have to Turn the air/fuel mixture Clockwise 1/8 at a time again listen for Rpms to go up just like the above except your turning it in because of the To Rich of a mixture.
Alleyoop

[threedogs61]

I agree with harrywr2. Stalling out at lights (or anywhere else obviously) and hesitation is a classic sign of tight valves.

Here is how to fix it:

scootdawg.proboards.com/index.cgi?board=discussion&action=display&thread=19177

[lostintexas08]

thank you guys will try

[als01seville]

It seems EVERYTHING IS VALVES, First of all Valves DO NOT GET TIGHT "unless they were adjusted wrong" if they haven't been touched they get LOOSE from wear NOT TIGHT. If they are loose you will notice lack of power hard starting etc.. Check the most obvious things first. If it starts good idles good runs good and it dies after you come to a stop suspect overheating vapor lock something is overheating to cause this. And the easiest is to check if your running lean which is the most common because running lean gives you a little more power but can cause overheating when running at full or near full throttle.
Alleyoop

[allatvparts]

We have complete top end rebuild kits for all 50cc, 150cc, 250cc and 260cc engines. If you have any problems with the intake valves or exhaust, and need replacement. Let me know. My name is Sam and you can reach me at 909 781 2616

[harrywr2]

Oct 15, 2009 19:27:38 GMT -5 als01seville said:

It seems EVERYTHING IS VALVES, First of all Valves DO NOT GET TIGHT "unless they were adjusted wrong" if they haven't been touched they get LOOSE from wear NOT TIGHT.

As the proud owner of 5 scooters...the exhaust valve gap closes up in the first 1,000 or so miles. Just does. After that they may go in the other direction depending on carbon buildup.

It has to do with the wear on the valve seat. Not the valve stem.

In the old days...with leaded gas and rich mixtures...the carbon buildup on the valve seat would tended to offset the wear, hence they would only get loose.

We are in a new age...running lean without lead. The valve gap closes as the valve seat wears...

[garyr]

Once again, Harry, Thanks for an explanation to a question I had. I wondered by the valves would seem to go tight, now, I know. I don't know if you have room for another bone, but, just in case, here comes one.
Garyr

[fossel]

if it starts when cold and dies when warm .Its the stator.You will think carb first,but it will get progressively worse

[scootnwinn]

This post is nearly 3 years old...