what could be wrong with this moped?

I got this tomos moped and what it does is that when you drive it
it tends to stall. it’s as if I hit the kill switch (just like that, dead)
after that it wont start until it cools off. Im good with small engines but this is a 2 cycle engine that for some reason is giving me trouble
Ive try’ed new spark plug still does it. Cleaned the carberator, changed the fuel filter and air filter, change the gasoline (just in case of bad gas or water) still does it. what is wrong with this thing?