my stock cam chain tensioner started going bad on my 05 with 16,000 miles. i began hearing the chain between 5-6k rpm so i replaced it with the ape tensioner. i adjusted it so it was as loose as possible, but got rid of almost all the cam chain noise between 5-6k rpm. i noticed that i have a lot of cam chain noise above 8k rpm that did not go away. i tried tightening the tensioner more but the noise is still there so i backed it off to where i had it originally set. Is this noise due to my chain stretching? or could it be something else? any help would be appreciated.