It appears you're interested in specifications for the Highland 507cc MX. This Cross / motocross model is powered by a Single cylinder, four-stroke engine with 507.00 ccm (30.94 cubic inches) of actual displacement before compression. Fueling is metered via Injection. EFI, fullu adjustable allowing this machine to produce its horsepower and torque. According to our records engine heat of the Highland 507cc MX 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 80/100-21 and the rear is 110/0-19 . The entire package is supported by the frame, HyTens stainless 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 front brakes and Single disc. Single pistin rear brakes. The Highland 507cc MX was launched in 2011, 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.