It appears you're interested in specifications for the Norton International Model 30. This Sport model is powered by a Single cylinder, four-stroke engine with 490.00 ccm (29.90 cubic inches) of actual displacement before 7.2:1 compression. Fueling is metered via Carburettor. Amal allowing this machine to produce its 29.50 HP (21.5 kW) horsepower and torque. According to our records engine heat of the Norton International Model 30 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, Cradle. We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on front brakes and rear brakes. The Norton International Model 30 was launched in 1953, 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.