That bolt doesn't look too bad. As DDL said get a pair of vise gripes, the real ones, not the Chinese ones at Harbor Freight and that will come out very easy. Just get a real good bite on it.
Man, you guys are scary! As fragile as this bike is I sure as hell am not going to beat on it like a constipated ape would. Way too much overthinking here.Is it me or does this look like it is countersunk, and remember the only reason this happens is wrong size wrench or cheap tools note made to spec, and to remove it I would first see if a sae size wrench would fit now since the head is ruin, lay it on it's side and get a impact drive you use with a hammer and try that it will bite and twist @ the same time when you strike it with a hammer. View attachment 408206
Well, if all else fails the solution is very simple and will cure the problem will very little effort.Three days and 68 how-to posts later. . . isn’t that drain bolt out yet?