I have a 2000 650r Motarded. After a hard top speed run the top end started ticking bad the next day. First I replaced the cam chain tensioner, still ticking so I checked valves, adj. an still ticking! Ticking is in the top end. Should I be looking at the decompression? Would this be more like a bent valve or cracked spring? Bike still has all the power of before an doesn't smoke, but tail of muffler has a little black soot around it. Thanks guys!