Hello, I just bought a 99 1500 GW yesterday. Cosmetically, it's pretty much flawless, as it was garage kept and covered. It only had 4300 mi. when I bought it. The previous owner had been using an additive for the gas tank that is both a cleaner and a stabilizer when the bike was not being used (can't remember the product name). Anyway, he had not ridden it in a while before he decided to sell it, and it would not start. I'm sure it could have used a carburetor cleaning, but I'm told a shop will charge around $1000 to do that onn a 1500 and he didn't want to spend the money ... he ending up spraying some kind of product (cleaner I would imagine- maybe the same stuff he had used as the stabilizer/cleaner) into the carbs to kind of prime it to get it started. That got it started and now it will start and run, the only noticeable problem is an idle that will began to fall off and then surge upward to about 1500 or 2000 rpm's before settling back around 1000. I does that every few seconds or so. There is also a little bit of hesitation when accelerating from a complete stop, in first gear. Once it gets moving, it runs well and smoothly and seems to accelerate without problems all the way through the rpm's in each gear. But... I've noticed that when the tank gets low, like close to the 'E', it begins to hesitate quite a bit accelarating from a stop and also after it's up to speed. I understand and would expect carb issues as well as the rough idle, with not having been ridden much over the years, but I don't understand why it seems to run and overall perform pretty well when the tank has plenty of gas in it but hesitate a lot when there is not as much gas in the tank. Does anyone have any ideas? Thanks, Paul.