It appears you're interested in specifications for the Rieju 50 MRX Castrol. This Cross / motocross model is powered by a Single cylinder, two-stroke engine with 50.00 ccm (3.05 cubic inches) of actual displacement before 12.0:1 compression. Fueling is metered via Carburettor. Dell´ortho PHBN 14-12 allowing this machine to produce its 8.00 HP (5.8 kW) horsepower and torque. According to our records engine heat of the Rieju 50 MRX Castrol is moderated by Liquid. You'll need to get familiar with the 6-speed transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 80/90-21 and the rear is 110/80-18 . The entire package is supported by the frame, Perimetral of double beam in steel.. We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Single disc. 2 piston calipers front brakes and Single disc rear brakes. The Rieju 50 MRX Castrol was launched in 2005, 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.