I was coming up the main street today when i got to the first of a few round abouts i noticed my throttle response had changed. It just was very sluggish to too pick up. I took it 500 meters more around to a car park where as soon as my hand came off the throttle the bike just stopped. After getting off i noticed smoke coming from the back brake pad and that when i pushed the back brake lever down with my hand it just went straight down no feeling at all. I had to wait 2 hours for it to come and get picked up as the shop that i brought it from and take it to is about 30 mins away. Has anyone else had a similar problem? It seemed like the back brake just applied itself and left itself applied as i rode the 500 meters.