OK, here they are (I hope!) disassembly sequence and comments:
This is step one: release the pointed stops by pushing down on red gasket, then remove the back and all the pieces.
All pieces laid out for reassembly. Remove last three screws.
See little hole right above thumb? Not the screw hole but the little hole at the bottom of the deep hole. That is 1/16 th inch. Smaller the better. Even a #60 drill size would work just fine. The bigger hole around the one drilled was cast in by Kymco.
This is where hole comes out. All this looks like the cap was originally made for a vent but these days the hole was not cast in or drilled to make the closed evap system. Look at the gasket that is next to black cover removed with those last three screws: forms a nice path to vent pressure and to drain back any fuel condensation.
Now put it all back together in reverse sequence. Put cap back on machine only after testing with key to make sure you can get it back off!
Karl