I've got a 99 KE100 with about 900 miles on it. This bike is almost new. The bike starts fine with the choke on, when the engine is good and warm I turn the choke off. The engine rpm then increases rapidly then the motor sputters and dies. If I put the choke back on, it'll run again. I haven't used the bike for the last couple of years, but when I took it out this year, it started acting like this. The carb was cleaned, but it wasn't dirty to begin with. Air cleaner is fine, and I always used preservative on it when it would be in storage. Is there any adjustments that I can make to the carb? Any tuning information or other ideas of what could be the problem? And yes, I did put fresh gas in it.