Are you familiar with the needles and what they do?
If you can find information on the factory settings resetting them to those would be the best way, however if you can't find them set the high speed needle flush with the top of the barrel. The low speed needle should be flush with the edge of the slide and the idle speed should be set so you can see about a 1mm gap when fully closed.
Since the engine is already run in you don’t need to break it in.
Always always always tune in the following order on a full tank and when the engine is warm.
1 - HSN or High Speed Needle
2 - LSN or Low Speed Needle
3 - Idle speed
Try to keep temps around 220/230 Fahrenheit, any hotter and it's too lean. You should always see a trail of smoke, since the oil is in the fuel if you don’t see any smoke the engine isn't getting any lubrication.
I'm sure you've youtubed lots of videos but if you still have questions or need help don't hesitate to ask.