By the time you have ridden 100 miles with no signs of problems, your engine should have gone through a few heat cycles, the brake linings should be adapting to their friction surfaces and the tires should be scuffed in enough to deliver good traction. It's then time to make an occasional full-throttle run, taking the engine right up to redline or the rev limiter. If that idea horrifies you, see if you can get a tour of one of the American motorcycle factories. You'll find that you weren't the first one to run it that hard. Before it's put in the shipping crate, every bike gets a full-throttle trip to redline under the watchful eye of several measuring devices ready to cancel its ticket if it doesn't produce full power. Some factories also send them around a test track once or twice.