Particlemen there is very right.
A brand new engine needs a certain time to run in, to match piston rings with cylinders, gear vs. counter gear , etc.
Given a new engine you want to have somwhat a winding road a head of you with many load changes. meaning acceleration - deceleration conditions. The more load changes ( soft RPMs in the first 300 miles - no WOT) over the break in periode then better. It gives time to the rings to break in good and seal better. a good broken in engine does life longer - performs better over time..
If I would take now a brand new zero miles engine and nail that thing for 100miles wide open ( closed circuit ) I would create right away increased hot gas blow by because my piston rings are brand new and have not accomodated to the Cylinder profile yet. - NOT GOOD - because that hot gas could lower piston skirt lubrication - increase wear - in the worst case cause some durability issues in the long
run:deadhorse:
Do you feel from where I am coming? Give it time - a engine is like a love relation - you want it to last - you give it some time - smooth - acceleration - deceleration - give the girl time to warm up .
The ever so watchfull Rotax God - loving father over his children.