2009 Yamaha Grizzly 550 Auto. 4x4 IRS Utility ATV Info - Features, Benefits and Specifications

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Key Features | Engine | Chassis/Suspension | Additional Features | Specifications


*2009 Grizzly 550 Auto. 4x4 IRS Utility ATV (Avail. with Electric Power Steering)*

Grizzly 550 IRS 4x4 ATV Key Features

The 500cc class has a new leader, with a fully featured package based on its best-selling bigger brother, the Grizzly 700 FI, with a new 558cc powerplant, Electric Power Steering and excellent value.
Electronic fuel injection means instantaneous cold starts and optimal performance in nearly any condition, from below sea level to 15,000 feet.
Electric Power Steering system lightens steering for superior comfort and terrainability. (EPS Model)
Industry-exclusive, fully automatic Ultramatic® transmission is the most advanced drive system in ATV-ing. An automatic centrifugal clutch maintains constant belt tension for reduced belt wear and industry-exclusive all-wheel downhill engine braking.
Industry-exclusive, three-position On-Command® In/Out RWD feature lets you switch between 2WD, limited-slip 4WD and fully locked differential 4WD—all with a simple push of a button.
Fully independent long-travel four-wheel suspension features double-wishbone suspension front and rear for maximum control and comfort over rough terrain.
Trick digital instrument panel boasts a multifunction LCD display with speedometer, odometer, dual tripmeter, hourmeter that counts hours that the engine is running, 4WD status, transmission position, clock and fuel gauge.

This 558cc 4-stroke SOHC 4-valve liquid-cooled engine is derived directly from the industry-leading Grizzly 700 powerplant.
Ceramic-composite cylinder liner provides outstanding durability and heat dissipation; 92mm forged piston is light and strong and rides on a carburized chrome-moly connecting rod.
New cylinder head has been optimized for this 558cc engine to deliver excellent throttle response and low-end power, with needle-roller rocker arms to reduce friction for fuel efficiency and torque.
Gear-driven crankshaft balancer shaft and 4-position rubber engine mounts reduce vibration.
Yamaha Fuel Injection uses a new Mikuni® 40mm throttle body and idle speed control valve to provide easy cold starts and flawless fuel delivery in nearly any condition, from below sea level to 15,000 feet.
High-capacity aluminum radiator with newly designed fan motor delivers maximum cooling efficiency and is positioned high in the frame for optimal protection.
5-position shift lever with L, H, N, R and P gates has a light shifting feel with easy engagement, providing positive Ultramatic® transmission control.
Electronic servo-activated 2WD/4WD/Diff Lock via the On-Command® system.

Full-size chassis provides the same high level of comfort enjoyed by Grizzly 700 riders.
New front and rear lower A-arm guards offer excellent protection —and Grizzly 550 features WideArc front A-arms for outstanding ground clearance that’s 5 inches wider than that provided by ordinary designs.
New CV boots are made of tough polyethylene for more durability than typical rubber boots.
Four-wheel hydraulic disc brakes serve up consistent, longlasting braking power under all sorts of nasty conditions.
Direct driveshaft design efficiently transfers power while providing outstanding durability with less vibration.

Additional Features

Electric Power Steering. This assist feature, pioneered by Yamaha on the Grizzly 700 FI EPS, lightens steering for superior comfort and terrainability. (EPS Model)
Dual 35-watt multireflector halogen bulb headlights with high/ low beams light up the night.
Trick digital instrument panel boasts a multifunction LCD display with speedometer, odometer, dual tripmeter, hourmeter that counts hours that the engine is running, 4WD
status, transmission position, clock and fuel gauge.