It appears you're interested in specifications for the NSU 351 OT. This Sport model is powered by a Single cylinder, four-stroke engine with 331.00 ccm (20.20 cubic inches) of actual displacement before compression. Fueling is metered via Carburettor. Bing AJF 2/20 allowing this machine to produce its 12.50 HP (9.1 kW) horsepower and torque. According to our records engine heat of the NSU 351 OT 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 3.25-19 and the rear is 3.25-19 . 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 Expanding brake (drum brake) front brakes and Expanding brake (drum brake) rear brakes. The NSU 351 OT was launched in 1938, 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.