It appears you're interested in specifications for the Jawa 350-639. This Naked bike model is powered by a Twin, two-stroke engine with 344.00 ccm (20.99 cubic inches) of actual displacement before compression. Fueling is metered via Carburettor allowing this machine to produce its horsepower and 32.00 Nm (3.3 kgf-m or 23.6 ft.lbs) torque. According to our records engine heat of the Jawa 350-639 is moderated by Air. You'll need to get familiar with the transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is and the rear is . The entire package is supported by the frame, . 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 Jawa 350-639 was launched in 1991, 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.