It appears you're interested in specifications for the Yamaha YZF 15. This Sport model is powered by a Single cylinder, four-stroke engine with 149.00 ccm (9.09 cubic inches) of actual displacement before 10.4:1 compression. Fueling is metered via Injection allowing this machine to produce its 17.00 HP (12.4 kW) horsepower and 15.00 Nm (1.5 kgf-m or 11.1 ft.lbs) torque. According to our records engine heat of the Yamaha YZF 15 is moderated by Liquid. You'll need to get familiar with the 6-speed transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 80/90-17 and the rear is 100/80-17 . The entire package is supported by the frame, Deltabox Frame. 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 Expanding brake (drum brake) rear brakes. The Yamaha YZF 15 was launched in 2011, 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.