Re: drive train lash
I also just downsized, but jumped to a Kawasaki 900 with belt drive. Not much experience with belt drives yet, but they do need to be inspected and maybe adjusted periodically, per the Clymer manual I bought and the User Manual I downloaded from Kawa.
3,000km is just broken in ! But the way I read forums and the books, getting a rock caught in the belt can cause this kind of problem. My books show inspecting the belt for tears and wear, as well as the pulleys (called pulley instead of sprocket) for abnormal wear. The book calls for adjusting the belt to a certain amount of tension (which should take up any slack, if the belt and pulleys are ok). Experienced wrenchers on the Kawa forums say that if you don't have a tool that measures belt tension, that if you can 'just' twist it in the middle almost 90degrees and it snaps right back, then the tension is ok. I haven't tried this yet.
I've not noticed any lash on my new bike, so don't think its a generic problem with belt drives. Do you know if the bike received its first service which should have been at about 1,000km? inspecting the belt should have been part of that. Was the rear tire changed for any reason?