I'm an old timer so I remember when break-ins were long, slow procedures to be followed religeously. Now-a-days CNC machines, materials, and expertice in design are such that long extensive break-ins are passe. I still change oil after the first tank full of gas to get rid of any metal filings or shavings that were left in the engine, then again after about 3 more tank fulls, and I hold the throttle at less than 3/4 full for 4-6 tanks of fuel. That's about it.