Quote Originally Posted by Spiider View Post
all it takes is an air bubble in the filter and the bike won't even start.

Sounds like his slow/pilot jet is plugged since it is 99% responsible for fueling at idle, or there just isn't fuel getting to it.
I would much prefer to swap out a $3 fuel filter than disassemble the carbs to clean out the jets because some crap from the tank got in there.

Just make sure to get a see through one. This way you can see what's going on easily (dirty, no fuel, etc).
Be sure to get a filter for a gravity-fed fuel system. Not all inline filters are ok for gravity-fed fuel systems!