What loctite would you recommend for an air cooled bike engine, just as insurance on crank bearings ? I have some wurth stuff here, but i don't think its much good anywhere there is heat, as in an engine.
I wouldn't recommend any. If the casing is good the bearing will hold perfectly, just heat the casing with a heat gun and cool the bearing and it will drop in. If you start using bearing lock then need to do it again it could cause you problems.
Not sure I would risk contaminating the oil in the engine either, that said I would probably look and see what the manufacturers workshop manual said to do