Easier said than done. Flashed it at 12 miles. Would've earlier but the dealer was a few miles away
Break-in is debatable, but generally everything should be seated in the first 50 miles if not sooner, drivetrain another story. Clutch and brakes will need a bit of time, along with the tranny and gears to mesh together with minimal heat. But 1000 miles--not sure you really need that long. Maybe hold off track days but on the street you'd be hard pressed to do any damage.