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lol @ overheating, I doubt it.
Firstly, how old/new is the bike? Still waiting on what type.
Anyway, with my first CAG pocket bike I did the following:
1. Got it home, filled with high quality fuel and synthetic 2 stroke oil mixture, went somewhere away from life and started it up, let it idol for 10 minutes (just idle, NO throttle).
2. Took the bike apart, took the stock fuel filter and threw it out (plastic bit of crap), replaced it with a metal filter that has replacable inserts. Took the fuel line, and squeaze clamps, threw them as well, installed new fuel injection fuel line with screw-close clamps.
3. Emptied the fuel tank an it's floating shreds of plastic, and flushed it with metho to get rid of any extra floaties in there before re-filling with 5 litres of high-grade synthetic 2 stroke mix.
4. Took the bike for a varied throttle ride (going from enough throttle to just start moving, to about 80% throttle, to about 50% throttle, to about 70% throttle, to about 30%, to about 60%, to about 40%, to about 80%), giving the bike a few minutes on each of the throttle stages.
This part is probably fairly important for longativity of an Internal Combustion engine, to vary the throttle around a bit, but not ever at 100% throttle during the run-in of the engine.
I ran a full tank of fuel through my bike doing this.
5. At this point, removed the stock spark plug, binned it, and fitted a quality NGK plug.
6. Borrowed a stand, and started tuning my bike's carby (get the carby handbook linked in here, follow it).
7. At this point, I repeated step 4's engine run-in, just to test and see how the carby tune went, my bike was almost perfectly setup from the box, throttle responce was vastly improved during the 3rd tank-testing after tinkering with the throttle though.
8. It was time! For this one, I actually had my bike at a motorsport racing event as my transport from campsite to toilet block and food stalls, but I decided it was time to give it WOT.
Took it to a long (about 1km) straight, started it up, let it warm up for 5 minutes so the engine was at operating temp, gave it a couple of quick throttle-flicks, then I slowly wound it open, until I could not wind it anymore. I held it there for about 90 seconds, released, and throttled again, and it kept getting faster and faster and faster (until one of the police patrolling the camping area decided to spoil my fun). She got up to about 60km/h, but was smooth, responsive, and very clean.
My bike barely blows smoke, and has a low-ish idle, but has never had stalling issues.
Remeber, 2-stroke engines are basic as, and anytime there is a problem it will be related to 1 of 2 things, fuel or spark.
For stalling, it's either getting no spark (dies), or it's getting no fuel (dies) or it gets too much fuel (sputters for a sec and dies).
For no spark, check coil, make sure it's working, check leads, make sure there is no issues (mine needed replacing, the connector pulled off). Check spark plug (the condition of the spark plug is critical in telling you fuel mixture, health of motor, etc, this is the same with cars.
For fuel-related issues, pull the plug out, check the cylinder for moisture, pull the starter a few times, if your getting a fine mistcoming out of the plug-hole without any throttle, chances are it's running very rich, and if you WOT the throttle and keep pulling the starter cord,it will spray fuel/oil mix everywhere (it's drowning the plug, and can not spark.
If your getting not-noticable fuel coming out of the spark plug hole when pulling the starter, and there is no throttle (but it idles alright) you might have a leaning out issue (the spark plug would be white-looking if this is the case as well).
My personal advice, read this post a couple of times, have a drink or 2, read it again, and goforth and tackle that 2-stroke engine and see how you go.
B.
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42cc of raw POWAR!!!!
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Stalling problems?? 
Linear Mode
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