Any recommendations on breakin procedures? Just bought a 400 for my wife and I'm unsure how to break in a scooter like this. The bike will need to go faster than 4000 rpm listed so I'm guessing that's a guideline. Do I just make sure we don't keep it at a constant speed and don't run it up (faster than 4000 rpm) for too long a time while it's breaking in? Any experience is appreciated.