It appears you're interested in specifications for the Yamaha X-City. This Scooter model is powered by a Single cylinder, four-stroke engine with 249.78 ccm (15.24 cubic inches) of actual displacement before 10.0:1 compression. Fueling is metered via allowing this machine to produce its 20.91 HP (15.3 kW) horsepower and 21.50 Nm (2.2 kgf-m or 15.9 ft.lbs) torque. According to our records engine heat of the Yamaha X-City is moderated by Liquid. You'll need to get familiar with the transmission and pay attention to final drive maintainence. Our best information shows that the front tire size is 120/70-M16 and the rear is 140/70-M15 . The entire package is supported by the frame, Steel tube underbone. We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Single disc front brakes and Single disc rear brakes. The Yamaha X-City was launched in 2007, and we're happy to know (or assume) you've got one in your garage. To help you keep your ride in tip-top shape, consider purchasing an owner or service manual.