Proper break-in, Car or Motorcycle, is first 100 miles take it easy but vary the engine speed, After that, to drive up to 1/2 throttle while driving for first 500miles.
Worst thing on any New engine is to drive at a constant speed/Engine RPM, for a extended period. Engine speed needs to be constantly changing, from accelerating to decelerating.
Meaning drive while accelerating for a while then let it decelerate for a while, then back and fourth.
The engine needs to be put under a Load, NOT a Hugh Load, But, Decelerating is just as important as accelerating, this is the load, for proper break-in. A varied load through acceleration and deceleration, is what is needed. Varied Engine speed, Not a constant speed, until it is proper broken-in, Then plan a big trip.
After 500 mile's you can go to a little under 3/4 throttle, but still vary the engine RPM, till at least 1000-miles