The air cleaner on the 205 I am currently resuscitating is mounted, partially, on the exhaust manifold. In the accompanying photo you will see three bosses, which are drilled and tapped. Two of these are used by the air cleaner support bracket. Whether they previously accepted 6mm studs or bolts I don't know - they are long gone. On the way out they "worked" in the holes, so new bolts or studs are a VERY loose fit. Only the bottom few threads have any hold at all, and Loctite will be no help, because of all the heat in this location.
I have a couple of choices:
1) I can drill and tap, to accept a 7mm or 8mm stud or bolt. I would prefer a stud. How hard/successful will this be in "heat-treated" cast iron? Any tips?
2) I can re-insert some new 6mm studs, along with some sort of metal epoxy filler, to take up the loose space. There should be enough thread left to retain the goop. What such products exist, and how successful is this going to be in such a hot spot?
Alternatively, you may have better ideas. Is it time to fit a K&N pod? Rob, does Windows offer a solution, maybe carried over from DOS 6.22? Is there a suitable adaptor cable?