It appears you're interested in specifications for the Yamaha RZ 350. This Sport model is powered by a Twin, two-stroke engine with 347.00 ccm (21.17 cubic inches) of actual displacement before 6.0:1 compression. Fueling is metered via Carburettor. MIKUNI VM26SS/2 allowing this machine to produce its horsepower and torque. According to our records engine heat of the Yamaha RZ 350 is moderated by Liquid. You'll need to get familiar with the 6-speed transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 90/90-18 51H and the rear is 110/80-18 58H . The entire package is supported by the frame, Tubular, double-cradle. We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Double disc front brakes and Single disc rear brakes. The Yamaha RZ 350 was launched in 1984, 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.