I have a 2002 ZX-6R. A couple of weeks ago I noticed a 'clicking' noise coming from the front wheel. I took the bike into the shop and they noticed that the front disc was rubbing on the break pad. They suspected that the disc must have been bent, so they replaced it, and the break pad. It seemed to fix the problem, but by the time I returned home, the noise was back. Anyone here ever have a similar problem?