I don't know if the 'stabil' did anything, I tried it as my bike had a similar problem after the previous winter wait, but that time the bike was hesitant on throttle openings but while still riding and waiting for the opportunity to get into the carbs the problem cleared itself, from then on I just enjoyed riding it and left every thing alone,
it's possible that the debris may have still been in the carb and has now recycled itself into the pilot jets again, or not
I have never taken these carbs apart other the the vacuum slides for new diaphragms, I did fit a new fuel filter about a year ago as the one on it was discoloured, the fuel tank is completely silver inside on the areas that are visible,
I am hoping to remove the carbs today as the weather is supposed to be warmer but I have to confess to being a bit nervous about it, my wrist is bad and I can not always apply the needed pressure to screwdrivers or even spanners sometimes so I am worried (maybe for nothing) about damaging the brass parts on removal if they are stuck, I did buy some 'repair' sets last year but I will not fit them after the writeups I've read about them, maybe the aftermarket jet gasket will be ok ?
I'll keep you informed,
oh yes when I first bought this bike it had a switch fitted to it that was just below the side panel, I found out by accident that it stopped the fuel pump, not fun when you don't know about it, so I removed it,
I am uneasy with draining the carbs for any length of time as the last bike I did that with (GPz750), all the rubber bits shrank and fuel leaked everywhere