Good follow up! Adjusting the Cam chain on THE RMZ450 is a big factor.After 3 hrs of use I pulled my cover off and the Cam chain was slightly loose,nothing alarming,but I adjusted anyway.I then put another 10hrs on it then checked again,it was considerbly loose,I will remind anyone with a RMZ,adjust it TDC ON THE COMPRESSION STROKE VERY IMPORTANT.Believe me or not I have 100+ hrs on mine and after the 1st 2 adjustments the 2nd one being the loosest the chain has not budged.I check the valves and cam chain every 10hrs regardless. Alot of riders are not taking the compression stroke serious when adjusting,the manual RMZ system is a good system,WHEN IT IS USED AND CHECKED PROPERLY!