Mate, if you have an Australian XT660Z, it will already have a foam air filter fitted.

Simply buy a DNA airbox mod and the Kev mods. This will make a huge difference to the way the bike performs....then go ride it.

Put the money you were going to spend on the Power Commander towards upgrading the front forks by fitting Ohlins springs and Tekniks T-Valves. This mod alone will give you more satisfaction than playing with FI mapping.

Next consider fitting Excel rims, as the standard rims are as soft as butter, something you will soon find out if you push the bike hard in the Aussie bush