Hey guys, Basically, just started to ride regularly again and I'm having a really big problem, with my rear brake finger. It seems to lose the will to live when I try and apply the rear brake. I have no problem on any other bike, or my motorbikes. The only thing I can think of is these new grips I got, as they were a little bit girthier. Any suggestions to why this is happening? And what I can do to stop it?