It appears you're interested in specifications for the PRC (Pro Racing Cycles) LX-R. This Cross / motocross model is powered by a Single cylinder, two-stroke engine with 49.00 ccm (2.99 cubic inches) of actual displacement before 8.9:1 compression. Fueling is metered via Carburettor. PRC “VM19s” Carbon Tech single stage Reeds allowing this machine to produce its horsepower and torque. According to our records engine heat of the PRC (Pro Racing Cycles) LX-R is moderated by Liquid. You'll need to get familiar with the Automatic transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 60/100-12 and the rear is 2.75-10 . The entire package is supported by the frame, 2nd generation PRC Steel Perimeter Frame; with Tapered stem bearings. 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 PRC (Pro Racing Cycles) LX-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.