2009 Grizzly 550 FI

FEATURES

MID-SIZED FUEL INJECTED ENGINE

The Grizzly 550 is powered by a fuel injected 558 cc 4-stroke engine, making it one of the most powerful middleweight ATVs on the market. It is fuel injected for easy starting and crisp throttle response, and will automatically compensate for temperature and elevation changes.

EXCELLENT POWER TO WEIGHT RATIO

Power is nothing if it comes with a bunch of additional weight. Considering the Grizzly 550 is lighter than many of the competitors in this class and this bear's power to weight ratio offers some hefty advantages over some of the bigger and bulkier ATVs. Less weight has an effect on everything from handling and acceleration to hill climbing and mud prowess.

ULTRAMATIC TRANSMISSION

Revolutionary Ultramatic" fully automatic transmission is the first automatic transmission to feature true engine braking. All four wheels receive engine braking in 4WD mode. Dual-range transmission with reverse. Low range has approximately 1.5 times the pulling power of high range.

ON COMMAND 4WD

Push-button servo-controlled "On-Command" system allows you to switch between 2WD, limited-slip 4WD and fully locked differential 4WD - all with the simple push of a dash mounted button. Real 4-wheel drive when you need it. With Diff-lock engaged, there's no need to wait for one wheel to spin. You have traction to all 4 wheels, immediately. This puts you in total control... you decide when you need 4 wheel drive... the machine doesn't decide for you.

4-WHEEL DISC BRAKES

Slowing your big-bore ATV down shouldn't involve standing on the brake pedal while squeezing the lever with all your might. 4-wheel disc brakes combined with full-time engine braking means slowing this Grizzly down requires less effort. And since the front and rear brakes can be operated independently, you have more control over how you brake depending on the situation.

MASS CENTRALIZATION AND LOWER CENTRE OF GRAVITY

A full tank of fuel carries a lot of weight with it. So we located the tank under the seat and the airbox up high where the tank used to be. This lowers the center of gravity which improves handling, stability and hill climbing capability. But it also raises the airbox reducing the chance of water and debris from getting into the engine.

V-BELT DUCTING

High mounted airbox, V-belt intake and exhaust ducts, reduce the opportunity for water and debris to enter the V-Belt housing.

REVERSE MOUNTED REAR SUSPENSION

The wheel center does not change but allows for a shorter frame which improves approach/departure angles, and allows the use of stronger ball joints (more clearance)

ADDITIONAL FEATURES 

• Aluminum cylinder with ceramic composite plating for improved durability
   
• Roller bearing rocker arms for reduced friction and improved engine performance
   
• Forged piston and carburized Chrome-Moly connecting rod for improved durability
   
• Revised intake and exhaust ports
   
• New throttle lever for reduced lever effort
   
• Airbox design has centrifugal debris trap to improve air flow
   
• Flat type foam air filter for easy cleaning
   
• Straight drive shaft layout for reduced vibration and improved durability
   
• Gull-wing front a-arms for improved ground clearance
   
• Polyethylene ball joint boots, front and rear
   
• Air cushion seat to provide comfort on those long rides.
   
• Floor boardwith large holes for mud evacuation, and special rugs to avoid buildup from underneath.
   
• Water resistant storage
   
• Centralize wiring layout, positioned for improved protection against the elements.
   
• LCD Gauge includes Odometer, Trip 1, Trip 2, Clock, Fuel gauge and Gear position
   
• Warning indicators: Engine, Water Temp., Reverse, Neutral, Parking, High Range, Low Range and LCD Drive / Differential Lock map .
   
• 35W Halogen headlight bulbs
   
• Neodymium hi-power magnet for improved output, charging capacity and light weight.
   
• Oil fed stator for improved cooling and reliability
   
• Forged Aluminum steering knuckle
   
• Gate type transmission shifter for improved shift feel.
   
• Cartridge type oil filter located to the front of the engine for improved cooling and simplified maintenance

TECHNICAL DETAILS

ENGINE

Engine	4-stroke, SOHC, liquid cooled, 4-valve, single
Displacement	558 cc
Bore and Stroke	92mm x 84 mm
Compression Ratio	9.3 : 1
Carburetion	Mikuni Electronic Fuel Injection w/40mm Big Bore throttle bodies and TPS
Ignition	computerized DC-CDI with 32 bit ECU
Starting	electric w/auto-decompression
Transmission	Ultramatic (sealed variable v-belt), w/ L-H-N-R and Park, 4-wheel full-time engine breaking
Final Drive	On-command push button 2WD / 4WD / 4WD diff. lock, direct shaft drive

CHASSIS

CRITICAL DATA