I got an EVT 168 2007 that has been traveling 800 km. Lately, I've been hearing an irritating buzzing noise from the rear wheel. Sounds a bit like a piece of plastic on a bike wheel. Under braking at higher speeds, this noise seems to be amplified. I thought it could be the brakes, but I can't figure out how to deattach them without brake fluid all over the place.
Any suggestions of what this might be?