I have a 99 f4 with 14000 km.. when i get the bike warm, after riding it a while. There is a noise when its at idle. Its hard to describe but it is constant, there is no variation in it. It sounds kinda like a clicking sound. I know lots of people say probably the cct but i think thats around 5000rpm and i know i have a bit of a cct problem. I will probablly change it later. But this sound doesn't come about until the bike is real warm. Anyone one have any ideas?