Just dropped a new .21 Novarossi Beat in my XB8.

The motor didn't come with an instruction sheet, but found one online. I didn't really find anything regarding needle settings during break-in.

Question: Can someone please tell me what is a good base-line setting for break-in? Also once I get a few tanks through it, would is a good base setting to start tuning?

The carb came from the factory with a white insert in it, is this good to keep in during break in or should it be taken out?

Thanks for any help! Much appreciated.