2012 Yamaha Grizzly 550 Owners Manual

The 2012 Yamaha Grizzly 550 is a rugged all-terrain vehicle (ATV) featuring a 558cc liquid-cooled, SOHC, 4-stroke engine with Ultramatic automatic transmission, On-Command 2WD/4WD with differential lock, independent double-wishbone front suspension, and a fully sealed wet brake system. This manual covers essential information for safe operation, maintenance, specifications, controls, troubleshooting, and warranty details.

Features at a Glance

Key components: 558cc engine, Ultramatic automatic transmission, On-Command 2WD/4WD system, front and rear racks, digital instrument panel, and full floorboards.

Pre-Ride Inspection

Before each ride, perform a thorough inspection to ensure safe operation.

1. Check fuel level and ensure there are no leaks.
2. Inspect tires for proper pressure (Front: 3.9 psi / 27 kPa, Rear: 3.4 psi / 24 kPa) and damage.
3. Test brakes (front lever and rear pedal) for proper function.
4. Verify all lights (headlights, taillight, brake light) are working.
5. Check throttle lever for smooth operation and free return.
6. Ensure drive chain is properly lubricated and adjusted.
7. Confirm oil level is within range on dipstick.

WARNING! Never operate the ATV if any inspection item fails. Address issues before riding.

Controls and Indicators

Familiarize yourself with all controls located on the handlebars and dashboard.

Left Handlebar: Headlight switch, 2WD/4WD switch, differential lock button, horn, indicator lights. Right Handlebar: Electric start button, engine stop switch, throttle lever, front brake lever. Dashboard: Digital display showing speed, fuel, gear, hour meter, clock. Foot Area: Rear brake pedal, gear shift lever (F-N-R), parking brake lever.

Indicator Lights: Neutral (green), Reverse (yellow), 4WD (blue), Differential Lock (orange), Engine Warning (red).

Specifications

• Model: Yamaha Grizzly 550 (YFM55FGP)
• Engine Type: 558cc, liquid-cooled, SOHC, 4-stroke, single cylinder
• Bore x Stroke: 92.0 mm x 84.0 mm
• Compression Ratio: 9.2:1
• Fuel System: Mikuni BSR42 carburetor
• Starting System: Electric starter with auxiliary recoil backup
• Transmission: Yamaha Ultramatic automatic with H, L, N, R ranges
• Final Drive: Shaft drive
• Suspension Front/Rear: Independent double wishbone / Swingarm
• Brakes Front/Rear: Dual hydraulic disc / Sealed wet multi-disc brake
• Tires Front/Rear: AT25 x 8-12 / AT25 x 10-12
• Dimensions (LxWxH): 83.1 in x 46.5 in x 49.4 in (2110 mm x 1180 mm x 1255 mm)
• Ground Clearance: 11.0 in (280 mm)
• Dry Weight: 604 lbs (274 kg)

Operation Guidelines

Starting the Engine: Ensure transmission is in Neutral (N). Turn key ON, pull choke if cold, press brake lever, press start button. Release choke as engine warms.

1. Shifting: Select F (Forward), N (Neutral), or R (Reverse) with gear lever. Always come to a complete stop before shifting between F and R.
2. 4WD Operation: Use the On-Command switch to select 2WD or 4WD while moving at low speed. Engage differential lock only when stopped or moving very slowly in 4WD to assist in extreme traction situations.
3. Braking: Use both front and rear brakes together for controlled stops. The sealed wet brake provides rear braking and engine braking in 4WD.
4. Riding on Slopes: Shift weight forward uphill, backward downhill. Avoid turning on steep slopes.

CAUTION! Always wear an approved helmet, eye protection, gloves, boots, and protective clothing. Never carry passengers.

Maintenance Schedule

Follow this schedule based on the hour meter reading or mileage, whichever comes first.

Basic Maintenance Procedures

Engine Oil Change: Run engine to warm oil. Place on level ground. Remove drain plug and oil filter cap. Drain oil. Replace filter (if equipped) and drain plug washer. Refill with 3.7 qts (3.5 L) of SAE 10W-30 Yamalube or equivalent 4-stroke motorcycle oil. Check level on dipstick.

1. Air Filter Service: Remove seat and side panel. Unclip air filter cover. Remove foam filter, wash in solvent, dry, and apply filter oil. Reinstall.
2. Spark Plug: Remove with spark plug wrench. Check gap (0.028-0.031 in / 0.7-0.8 mm). Clean or replace with NGK CR7E or equivalent.
3. Drive Shaft Oil: Remove filler and drain plugs. Drain old oil. Refill with 80W-90 gear oil until it reaches the filler hole level.

Tip: Always use genuine Yamaha parts or equivalents meeting Yamaha specifications.

Storage Guidelines

For long-term storage (over 30 days), prepare the ATV to prevent deterioration.

1. Clean the ATV thoroughly and apply wax to painted surfaces.
2. Change engine oil and filter.
3. Fill fuel tank and add fuel stabilizer. Run engine for 5 minutes to circulate.
4. Remove spark plug, pour a teaspoon of engine oil into cylinder, crank engine slowly, reinstall plug.
5. Disconnect battery negative terminal. Store battery in a cool, dry place and charge monthly.
6. Inflate tires to recommended pressure and block ATV to lift tires off ground.
7. Store in a cool, dry place away from sunlight and moisture.

CAUTION! Gasoline is extremely flammable. Perform fuel system work in a well-ventilated area away from sparks or flames.

Safety Information

Read and understand all safety labels on the ATV. The Grizzly 550 is an adult ATV designed for operators 16 years and older with a valid driver's license. Never operate on public roads. Avoid paved surfaces; handling differs greatly from off-road. Always inspect the ATV before riding. Never carry passengers. Do not ride under the influence of alcohol or drugs. Use extreme caution on difficult terrain. Complete a training course. Supervise young or inexperienced operators.

Warranty & Support

Yamaha Motor Corporation, U.S.A. provides a limited warranty for the Grizzly 550. See your Yamaha dealer for complete warranty details. For technical support, parts, or service, contact an authorized Yamaha ATV dealer. Keep your proof of purchase. Owner's manual updates or additional information can be found at www.yamaha-motor.com.

Troubleshooting

Reset: Disconnect battery for 10 minutes to reset ECU if warning light persists.

Service: For complex issues, contact an authorized Yamaha dealer. 1-800-88-YAMAHA (1-800-889-2624); www.yamaha-motor.com