Here's more on the new 2009 Yamaha Grizzly 550 FI 4x4...
Yamaha's new 558cc engine is based on the Grizzly 700 FI. It's smaller thanks to a reduced 92mm bore, but features a Ceramic Composite Plated Cylinder and Roller Rocker Arms to reduce friction. The valve pitch, seen here, matches the valve and combustion chamber size to 558cc which Yamaha says will improved throttle response and bottom end power. We can't wait to try this baby out. Stay tuned for a detailed ride review in a few months.
Check out the industry exclusive 4-wheel braking system that Yamaha is using on the new 550. It features a handlebar mounted rear master cylinder and separate front and rear controls that operate front and rear hydraulic brakes. We're appreciative that Yamaha allows us to operate the front and rear brakes seperately, unlike some models in production.
Yamaha is expecting you to tackle serious mud and water with their new 550. That's why they offer this new air filter layout, which is mounted as high as possible on the machine. Check out the water trap incorporated in the airbox unit.
Yamaha tells us there is six inches of foam in the 550's seat. That should offer a comfortable ride to say the least. Also seen here is the left side shifter. Gears for the 550 offer new ratios for easier engagement and operation. The left hand operation should offer easy shift & throttle control.
A 4.8L sealed storge container is found under the seat, while a 3.5L sealed container is located within the front fender. On the dash is a Speedometer, Odometer, Dual Trips, Clock, Hour Meter, 4-Wheel Drive Indicator, Transmission Position, Fuel Gauge and a Self Diagnostic & Actuator System.
Yamaha's new imroved thumb throttle shape is said to improved feel and offer the rider less fatigue in his thumb. Shifting in and out of 4 wheel drive is easy enough with this 2wd/4wd/Diff Lock push button, but we would rather have this on the left side of the bars.
As you can see above, Yamaha is pretty serious about entering the new 500cc utility class...
