Hey guys, I had a problem about a month ago. The bike picked up a lot of drag from somewhere. The dealer said they checked everything it could be, there was also way too much oil in it from the previous service. They changed the oil free of charge to the correct amount and suddenly the bike was perfect again. Then unbelievably 3 weeks later it came back from out of nowhere even worse. Feels like there's a massive elastic band attached to rear of the bike and a far off wall in the low and mid end. I checked the brakes but there doesn't seem to be rubbing. Front wheel turns fine. Cleaned and checked the airfilter. Tire pressure is fine. Chain is not too tight or too loose. Is cleaned and lubed. Two things that I think may be a problem: I recently had the battery and stator changed, and also a GPS cable attached the battery with a plastic spliter added so it just runs to a plastic plug with no GPS attached to it. So could be a power issue from some of these? Also took a video of the rear wheel spinning. Please take a look and see what you think. Perhaps could be a misaligned chain/sproket? Or bearings? Unfortunately I don't know how the wheel spins when there's not an issue, so can't definitely say that that's where the problem is. Seems like a lot of clattering noise but not much forcing the wheel to stop turning. (ps, the clattering noise is slightly louder in the video than in real life) Thanks for any opinions.