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 400.00 ccm (24.41 cubic inches) of actual displacement before 11.5:1 compression. Fueling is metered via Carburettor. Carbs 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 transmission and pay attention to final drive maintainence. Our best information shows that the front tire size is and the rear is . 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 front brakes and rear brakes. The Yamaha FZR 400 was launched in 1988, 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.