I recently took my '12 Yamaha R6 completely apart when I repainted it. When I put it back together I didn't realize but I'd forgotten a washer on the swingarm axle which was causing some movement of the swingarm, I've since corrected that error but road the motorcycle for about a week before fixing it.
At the same time I fixed that I replaced the chain and front and rear sprockets. But now I notice if I spin the rear wheel, there is a very subtle wobble. I can only tell because if I watch the chain when I spin the wheel I can see the chain moving in a slight wobble pattern.
I'm worried that perhaps the week that I rode the motorcycle with the missing swing arm axle washer may have caused the axle to be bent?
When I repainted the motorcycle, I had the rims powder coated. Could it maybe be if the rims were not balanced well when I had them put back together? I had to take them to a shop to have the rubber and bar rings removed before I gave them to the powder coater. I also had the shop put them back together when it was done but I don't know if they balanced them or not.
Or what else could it be be?