here is the problem: PO tightened the oil filter bolt too tight, you have to use a grinder to remove it...what do you do?
first you want to smooth the surface of the filter cover and connected fins where the new bolt will attach to. i used a grinder, then went to a dremel tool to finish up the surface. it should be as smooth as possible.
then grind off all the head of the filter bolt, taking care to comepletely remove any and all burrs. you will need to re-use the o-ring as it helps hold everything together and create a sealing surface.
what you want is basically a tube looking bolt.
finding the center of the bolt, drill and tap the end. i used a 5/16 tap as that's what i had on hand. now make sure to completely clean all burrs, and shards from inside and out. i used air nozzel several times to be sure. running your bare hands over the edges will reveal any areas you still need to address.
now go to a home depot type store and get a 5/16"x1" bolt, fender washer(washer needs to bigger than the hole it is sealing), 5/16 rubber washer, nylon washer and 5/16 flat washer. as you can see from the photos, you will have to replace the rubber everytime you remove the bolt. you could also use a "radial tube car tire patch", just punch a small hole in the center.
now screw in the filter bolt, using a small screwdriver inserted thru the holes in the bolt, to just tighten the bolt, REMEMBER, not too tight...this is a temporary fix until your bolt and filter cover arrives.
now assemble the filter, filter housing and insert your new 5/16 bolt with washers to hold the assembly together. next,tighten with a wrench and ride your bike while you wait for the new parts to arrive.
remember this is just a temporary fix, not designed for long term, but who knows?!
total cost .91 tax included