I put my GPX250R up on it's centre stand today; pretty much just to have a look because I am new to riding and trying to learn things. I noticed that the rear wheel makes a grinding sort of noise when I turn it. I took a video of it which you can find here: Dropbox - VID_20160303_183455682.mp4 Is this something to be worried about? I've only had the bike a week so as far as I know it could been like this the whole time and it hasn't felt weird to ride or anything. My first thought was something to do with brakes grabbing but a roadworthy was done about two weeks ago before I bought it registered so that should have been checked I would have thought. EDIT: Just checked and the front wheel is making the same noise.