It appears you're interested in specifications for the Yamaha Grizzly 350 Auto. 4x4 IRS. This ATV model is powered by a Single cylinder, four-stroke engine with 348.00 ccm (21.23 cubic inches) of actual displacement before 9.2:1 compression. Fueling is metered via Carburettor. Mikuni® 33mm BSR allowing this machine to produce its horsepower and torque. According to our records engine heat of the Yamaha Grizzly 350 Auto. 4x4 IRS is moderated by Oil & air. You'll need to get familiar with the 5-speed transmission and pay attention to final drive Shaft drive (cardan) maintainence. Our best information shows that the front tire size is 25/8-AT12 and the rear is 25/10-AT12 . 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 Double disc front brakes and Single disc rear brakes. The Yamaha Grizzly 350 Auto. 4x4 IRS was launched in 2010, 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.