I was tired of cleaning dirt out of the carb all the time so I tried to clean the rust out of my gas tank. I filled the tank with muriatic acid ,with a rubber plug in the petcock hole, and let it sit awhile. About half an hour later the acid was dripping out of the tank under the Ciao. I emptied and flushed the tank with water and found a spot where the acid had burned through. It's in a spot that you can;t get at to fix, under the slot that the plastic side panel screw turns into. Can i take the moped (tank does not come off ) to a gas tank renewer place and have it sprayed inside and coated to stop the leak ? There is no way to fix the hole with a patch on the outside. Any body have this same problem? bruce