Keeway matrix 50cc scooter cuts starts to cut out after it gets warmed up

SOURCE: i have a 2007 keeway arn 150cc scooter i got alot

first of all, was the bike running, then parked for a signifigant period of time? if so, the first thing your going to want to check is the fuel system. theres a fuel hose running from the fuel tank to the carburetor. remove the fuel line from the carb to check the condition of the fuel. fresh gas has almost a clear look. if it appears to be fine, then proceed by checking the carb to see if there is fuel in the reservoir. at the bottom of the carburetor, there should be a small screw. turn it out counterclockwise to see if gas comes out from one of the overflow fittings on the carb. if it begins to leak, then you most likely have enough fuel in the carb to start it. if it comes out of the hose looking dark, or smelling kind of funny, then youll need to clean the fuel system. to do that, you must drain all of the old fuel, flush the fuel tank a bit with fresh fuel, refill it with fresh fuel, and also clean out the carburetor. if youve never done this before, i would reccommend having a technician do it for you. lost parts or mis-adjusted carburetors can not only cause mechanical damage, but also be a potential safety hazzard due to performance problems. if the fuel looks and smells fresh, then your going to want to check for ignition next. remove the spark plug from the cylinder head, attatch the boot to the top of the plug, make sure the electrode end is touching a good grounding point on the engine, and press the start button. BE CAREFUL on this step. if the plug sint grounded well, it could lead to you getting an electrical shock from the ignition system. its a good idea to hold the spark plug or boot with insulated pliers during this step, just as a precaution. while the engine is turning over, watch the gap on the spark plug end to see if there is a noticable spark. it should be fairly easy to hear as well. if there is spark, then your ignition system is most likely in good condition, so move on to the next step. if there is no spark, try this process over with a new spark plug. if the new one still doesnt spark, there is a problem with one of the components in the electrical system, and that should be further diagnosed by a certified technician.
I hope this helps you out a little bit. these are the first things that I would check. If you know the fuel system is in good condition, and you can see that there is a good ignition source, then you have a mechanical problem that would require more information to attemp to diagnose. if you have any questions, feel free to contact me. Ill be happy to further clarify or explain anything that I mentioned here.

SOURCE: I Have a Keeway Supershadow

One of two: Your battery is totally dead (very common in the winter if you left it on the floor), or your bike could be facing problems with the charger system.

Go to this page:

KEEWAY SUPERLIGHT BATTERY

and us the translator. There you have tips and the electric diagram of the Keeway Superlight.
Good Luck.