It appears you're interested in specifications for the Yamaha YFM250R. This ATV model is powered by a Single cylinder, four-stroke engine with 249.00 ccm (15.19 cubic inches) of actual displacement before 9.5:1 compression. Fueling is metered via Carburettor. Mikuni 29mm allowing this machine to produce its horsepower and torque. According to our records engine heat of the Yamaha YFM250R is moderated by Air. 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 20/7-10 and the rear is 19/10-9 . The entire package is supported by the frame, . We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Double disc front brakes and Single disc rear brakes. The Yamaha YFM250R was launched in 2009, 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.