They said there was somthing in carb. That was about three weeks ago. .... I now have just under 200 miles on it and it is acting up again!!

I have not brought it in yet this time .... Anyone else have this prob ?? I use premium gas like the dealer told me to (I know thats a touchy subject here ) from the pump , not from a gas can. I have only put gas in it 3 times, it is full right now. I drive it most every day.
If there is crap in carb how would it be getting there? How is it getting through fuel filter? I wouldnt think that there has been enough gas through it to be built up.
Any thoughts?
Know where I can down load the 50cc service manual?
How does roadside assistence work? Would they actualy pick it up and bring it to the nearest dealer? Free ?