It appears you're interested in specifications for the Husqvarna FC450. This Cross / motocross model is powered by a Single cylinder, four-stroke engine with 449.30 ccm (27.42 cubic inches) of actual displacement before compression. Fueling is metered via Injection allowing this machine to produce its horsepower and torque. According to our records engine heat of the Husqvarna FC450 is moderated by Liquid. You'll need to get familiar with the 5-speed 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 140/90-18 . The entire package is supported by the frame, Central tube frame made of chrome molybdenum steel tubing. We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Single disc. Four-pot brake caliper front brakes and Single disc. One-pot brake caliper, floating disc rear brakes. The Husqvarna FC450 was launched in 2014, 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.