general

Hi I have a 49cc huashengtaishan 4stroke up until the other day it was running good but all of a sudden while I was accelerating it just quit going. The motor never died and if I play with the trottle I could get it to act as if it was gonna take off. If I WOT it dies. I have drained the gas...

I am new to motorized biking, What are the best ways to increase my speed i have a grubee skyhawk gt5 with a cns carburator? I also have a boost kit (not installed yet) but i did install a 36 tooth sproket. usflgusflg.xx. Tank you so much, any response is apreciated.