I have about 750 miles on my ZRX and am waiting to get it in for the 600 mile checkup. Dealer was booked for 2 weeks so I will continue to ride until then. The bike has really loosened up and feels great. I commute to work every day on it and love how smooth it runs on the freeway. I have been checking my gas mileage and it started out new at around 32 miles/gal. Then it crept up to 36 for a while and now the last tank I got 41.7 miles/gal. Not bad for street and freeway riding. I don´t dog it trying to get the mileage, but ride it agressively especially on the freeway since that where the worst drivers are.(cell phone junkies) Ha! Freeway speed is around 70 to 75 depending on the traffic. I´m very pleased with the performance and the mileage. Anyone else out their getting pretty good mileage?