For what it's worth, I recommend he read Proficient Motorcycling and More Proficient Motorcycling. This to alert him to what to expect on the road. After reading David Hough, if he is still interested in riding, get him into a good riding class. Finally, it might be a good idea to make sure he gets a modest motorcycle for the first year or so. This last is to learn to depend on the physical and mental skills of motorcycling and not on power.