it sounds like its coming fromthe clutch arm that the clutch cable hooks up to.If you pull the clutch in it goes away let the clutch out a few seconds later it comes back,also at idle, if i bring it off idle maybe 500rpm it will go away, let it idle few seconds it comes back. now my push rod had some blue marks from heat , from the side that goes in the motor by the clutch arm ,could it be that or i think there is a bearing in clutch arm could that be bad and does it spin alot if so how hard is it to change that bearing and seal.