I came many times to this forum to check for updates. I had a thousand problems with my Roketa Bali 250cc and followed many of the tips posted here. My main problem was in the electrical conections. Those white little plugs that connect to each other are very cheap and badly mounted and as the bike vibrates they come loose. What I did was simply eliminate them and connect the wires directly. After opening everything down to the frame 4 times, we finally find the problem and now it is running all right.