It appears you're interested in specifications for the Norton Commando 850 Interstate. This Sport touring model is powered by a Twin, four-stroke engine with 828.00 ccm (50.52 cubic inches) of actual displacement before 8.5:1 compression. Fueling is metered via allowing this machine to produce its 51.00 HP (37.2 kW) horsepower and torque. According to our records engine heat of the Norton Commando 850 Interstate is moderated by Air. You'll need to get familiar with the 4-speed transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 4.10-19 and the rear is 4.10-19 . 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 rear brakes. The Norton Commando 850 Interstate was launched in 1974, 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.