I recently put a chrome cam cover on my 09 EFI T100 and I am posting this in the hope that it is useful to anyone attempting the same. First of all thanks to all who have posted information about this procedure as I don't think I would have attempted it without your encouragement.
Lets get to it:
HINTS: Prepare a "nest" to place the gas tank once it is removed so it won't be damaged. Optional: buy a new cam cover gasket and four cam cover bolt rubber washers. (The original gaskets and washers worked fine for me.) And, run the fuel low in the tank or it will be handful to manhandle.
Unbolt the gas tank at the rear and use a wooden board on its side to prop up the back of the tank. This gives you enough room to disconnect the fuel pump (internal in tank) wiring harness on the left side and pull off the vent hose on the right.
Notice there was some crud at the bottom of the vent hose on the tank that I cleaned off before reassembling.
No picture for the next part as my hands were full of gas tank. Stand on the right side of the bike (wearing a non-scratching shirt), grip the tank and rotate it about 90 degrees towards you (with the top of the tank against your chest) so you can reach around with your free arm and disconnect the fuel line quick release. There is a lot of pay in the fuel line to let you do this. Make sure you have a rag handy as some fuel will spill from the lines. Again, make sure the tank is low on gas or it will be too heavy. I found it helpful to rest the rear of the tank in a notch in the frame while doing this to stabilize it. Make sure you don't contact the battery terminals as they are not far away.