It appears you're interested in specifications for the Yamaha FZR 400. This Sport model is powered by a In-line four, four-stroke engine with 399.00 ccm (24.35 cubic inches) of actual displacement before 11.5:1 compression. Fueling is metered via Carburettor. Four Mikuni BDST32 allowing this machine to produce its horsepower and torque. According to our records engine heat of the Yamaha FZR 400 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 110/70-R17 and the rear is 140/60-R18 . The entire package is supported by the frame, Aluminum Delta Box. 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 FZR 400 was launched in 1989, 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.