Hi, everybody , I just got 08 st1300 with 35k , and noticed vibration on handlebars and through the tank when the revs are over 2500, changed air filter(old one was original , never chenged probably, it looks caked with black dust),idle got better , but stillnot steady, even when the engine is at right temperature, when it is on center stand and I shift throughgears there is a clunking noise, but when I press the clutch , noise is gone, what is next try to fix the bike, please, any reply would be greatly appreciated?