Are there any signs or hints that your bike needs the valves adjusted? I bought my 03 bike with 7200 miles on it...it now has ~ 9800 and purrs like a kitten...60 mpg, smooth acceleration, no hiccups. Of course the owners manual says they should be adjusted at 7500 mile intervals. It is really going to p___ me off if I take it in for the valve service and it's not running as good as before. What do ye experts think?