It appears you're interested in specifications for the Factory Bike Desert YR 50. This Enduro / offroad model is powered by a Single cylinder, two-stroke engine with 49.70 ccm (3.03 cubic inches) of actual displacement before 12.0:1 compression. Fueling is metered via Carburettor. Dell’Orto PHBN allowing this machine to produce its horsepower and torque. According to our records engine heat of the Factory Bike Desert YR 50 is moderated by Liquid. You'll need to get familiar with the transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 90/90-21 and the rear is 110/80-18 . The entire package is supported by the frame, Hardened Steel CrMo. Bolt-on rear section. 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 Factory Bike Desert YR 50 was launched in 2006, 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.