Was hoping for a bad fuel line, as a previous owner had replaced some with the clear kind that was rock hard. Alas, it turned out to be a bad o-ring at the carb fuel inlet.
Boy you really need to remove half the bike to get to everything, mostly because of that secondary air box.
Luckily for me though this unit was pretty well cared for most of it's life, for being 30 yrs old all the hardware is still rust free, and all the rubber parts are still pretty supple. Not usually my luck lol.
All better now though, plus new fuel pump, lines, filter, and carbs re-synched. 30 mile shakedown done, more miles tomorrow!!