Like Gizmatron said, there are no stock settings really. Your motor being a US distributed motor will have the shorter LSN needle, so it will tune like most other motors out there. Hazarding a guess to get you started, I would say try, LSN 1.25 - 1.5 turns in from flush, and HSN 1 - 1.25 turns in from flush. That should get you running anyway, then fine tune from there.
Contact Rex (22 Racer), he will know. We have the long needle carbs in our GO motors here, which have quite different settings.