Anyone have any idea why my 550 mile old, moderately broken in 05 zx10 is ticking or almost clanking at idle after warmup. The sound comes in waves a few ticks at a time and then goes away every couple of seconds. It only does it when the bike is around 170 degrees and it really sounds like a hollow metal clank, not a tick but for sure annoying!! Do these things need valve adjusting or maybe the headers tightened this soon? I havent been in yet for the first service, but when I do they are going to fix this crap then. Any ideas for me now?