My 97 XR 650L has a tick at idle. I thought it could be the valves so I checked and only adjusted 1 very slightly, all others were right on. It sounds like it's in the top end. It has done this for ~1000 hard miles. I keep waiting for it to fail (big bore kit here I come) but it never dose. Mabybe the decomp? Anyone else have a tick at idle?