At 1000 miles, your engine is still tight, so gas mileage in the 50s is to be expected. If you look at my Fuelly.com profile, you'll see that I started out in the 50s, got up to very near 70, but it's dropped off recently to the 60s. Could be the seasonal change in gasoline mixture, could be something going wrong with the scooter, could be that I'm unintentionally riding it more aggressively... not sure.