I have a 1999 XR650L with 3700 miles that has started to make a loud ticking noise. I road it 150 miles last week and when I got home I really noticed this new noise. I bought the bike with 2500 miles on it three months ago and it runs good. I checked the valves after the ride and found the right exhaust valve had .040" clearance, the lock nut was tight. It still makes a loud ticking after the valve adjustment. I researched the TT site and went back and checked the valves again and noticed a loud tick when turning the crank counter clockwise to find TDC. More research shows it has an automatic decompression release and I'm sure thats whats making the noise, any ideas?