Gray, you mentioned in a post title "2009 Yz450f best exhaust?" that you run a stud and nut on one of the bolts holding the oil filter cover on. You did this in order to avoid having to move the header each oil change. While that is a great idea what do you think of ALSO doing that on the oil drain bolt that always gets stripped. I do really like your ball bearing idea but I am too afraid I will screw it up. Putting a stud with some locktight in a pretapped hole sounds so easy a caveman (like me) could do it... If you think that is reasonable, what lengh of stud did you use, I assume you use some type of washer between the cover and the nut and torque it to about the same setting??? Is locktight even necessary or should some anti-sieze lube be used in case I ever need to get the stud out. I am certainly not an engineer and only have some basic skills so any relative info would be much appreciated. thanks.