I think that kit in the link looks pretty good, i made the one that i use out of my old petcock from when i put my dual pingal on. I also used a fuel tank off of an old weed eater and some fuel line.
I broke a connecting rod one day racing out at the hill and forgot to drain my carbs,when i went to put my bike back together i took my bowls off of my carbs and you wouldn't belive all the nasty looking crap and green corrosion looking stuff in them.It is very important to purge your bike cause it will also corrode your bearings.I purge mine after every day of riding.