roddy,  the first 1,000to 1,500 miles the bike is just braking in, If you have good compression the chances are the bike was not abused,  and you shouldn't need to think about the chain being stretched until about 10,000 miles, I wouldn't worry unless you start hearing unusual noise from the valves(louder) or feel unusual vibrations, different from each side ( place the side of your feet against the side cases) from the lower end.

Using the proper size tools , and if use  six point wrenches and sockets rather than 12 point might help, you might also change to Hex head bolts . You might find a company that supplies a kit to replace them all.