It appears you're interested in specifications for the Rieju MRX 125. This Enduro / offroad model is powered by a Single cylinder, four-stroke engine with 125.00 ccm (7.63 cubic inches) of actual displacement before compression. Fueling is metered via Carburettor. Mikuni VM20SS allowing this machine to produce its horsepower and torque. According to our records engine heat of the Rieju MRX 125 is moderated by Air. You'll need to get familiar with the 5-speed transmission and pay attention to final drive maintainence. Our best information shows that the front tire size is 90/90-21 and the rear is 120/80-18 . The entire package is supported by the frame, Double cradle. Highly resistant steel perimeter. 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 Rieju MRX 125 was launched in 2008, 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.