First of all, please excuse my call name. I know i'am in the Red Rider Hood! What I am after is the correct fix for my riding buddies 05 CRF450R. I have already adjusted his intakes once and the left was a negative .006. After only apporx. 3 more hours of ride time there is zero lash on the same valve. After much reveiw it appears the way to go is to get a 06 head and put kibblewhite valves and springs in it!? Is ths correct? Or do you guys suggest something else. Need to get him back on the track ASAP. Thanks for any help in advance!!