I don't see information about breaking-in a new engine in the operator's manual online (other than changing the transmission oil after 25 hours and the engine oil after 50 hours), but does Beta have a specific procedure to follow for the first few hours of running a new engine?
We recommend that you vary the engine speed and not run it for longer than 30 minutes at any one speed.
When you do your first oil change I suggest that you go around the installation and check all mounting bolts etc for tightness.
I have always changed engine oil and filter earlier than recommended on the first service. This practice has worked out well for me and dates back from when I was learning about engines and maintenance.
I would do both at 25 hours and then at 100 hours.