2010 YAMAHA Grizzly 550 FI Auto. 4x4, CLASS-DEFINING PERFORMANCE IN A GRIZZLY TOUGH PACKAGE. Born from the award winning Grizzly 700 FI, this fully sized ATV has fuel injection, our exclusive fully automatic Ultramatic. transmission, On-command two-wheel drive / four-wheel drive with differential lock, independent rear suspension, digital meter, disc brakes, and more.