It appears you're interested in specifications for the Yamaha XT 660 R. This Enduro / offroad model is powered by a Single cylinder, four-stroke engine with 660.00 ccm (40.27 cubic inches) of actual displacement before compression. Fueling is metered via Injection allowing this machine to produce its 47.33 HP (34.5 kW) horsepower and 60.00 Nm (6.1 kgf-m or 44.3 ft.lbs) torque. According to our records engine heat of the Yamaha XT 660 R is moderated by Liquid. You'll need to get familiar with the 5-speed transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 90/90-M21 and the rear is 130/80-M17 . The entire package is supported by the frame, Steel tube, diamond shaped. 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 XT 660 R 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.