Yamaha Grizzly 350 Manual

The Yamaha Grizzly 350 is a rugged, all-terrain vehicle (ATV) designed for both utility and recreational use. It features a reliable 348cc 4-stroke engine, automatic transmission with selectable 2WD/4WD, independent rear suspension, and a durable chassis. This manual covers essential information for safe operation, maintenance, specifications, and troubleshooting of your Grizzly 350 ATV.

Features at a Glance

Key components: 348cc 4-stroke engine, Ultramatic automatic transmission, On-Command 2WD/4WD system, independent rear suspension, front and rear racks, and a durable steel frame.

Pre-Ride Inspection

Always perform a pre-ride inspection to ensure your ATV is safe to operate.

1. Check fuel level and ensure there are no leaks.
2. Inspect tires for proper pressure and any damage.
3. Test brakes for proper operation and check fluid levels.
4. Check all lights (headlights, taillights, brake lights).
5. Ensure throttle moves smoothly and returns to idle.
6. Check oil level and look for any fluid leaks under the ATV.
7. Verify that all controls (handlebars, levers) are secure.

WARNING! Never operate an ATV that fails any part of the pre-ride inspection. Repair any issues before riding.

Controls and Operation

Familiarize yourself with all controls before starting the engine.

1. Starting: Insert key, set parking brake, shift to Neutral (N), pull choke if cold, press start button.
2. Driving: Release parking brake, select Forward (F) or Reverse (R), apply throttle gradually.
3. 2WD/4WD Selection: Use the On-Command switch on the left handlebar to select 2WD or 4WD.
4. Differential Lock: Engage only when extra traction is needed and at low speeds.
5. Braking: Use both front and rear brakes together for controlled stopping.

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

Specifications

• Engine Type: 4-stroke, SOHC, air-cooled
• Displacement: 348cc
• Bore x Stroke: 83.0 mm x 64.5 mm
• Compression Ratio: 8.3:1
• Fuel System: Mikuni BSR33 carburetor
• Ignition System: DC-CDI
• Starting System: Electric and recoil
• Transmission: Automatic Ultramatic (H, L, N, R, F)
• Final Drive: Shaft
• Suspension Travel (Front/Rear): 6.7 in / 7.1 in
• Ground Clearance: 10.0 in
• Dry Weight: 551 lbs (250 kg)

Maintenance Schedule

Regular maintenance is crucial for safety, performance, and longevity. Refer to the table below for key intervals.

Fluid Checks and Changes

Use only recommended Yamaha fluids and follow proper procedures.

1. Engine Oil: Check with ATV on level ground. Warm up engine, then shut off. Wait a few minutes, remove dipstick, wipe, reinsert, and check level. Change oil and filter per schedule.
2. Front/Rear Gear Oil: Check levels at fill plugs. Change fluid according to maintenance schedule.
3. Brake Fluid: Check reservoir levels. Fluid should be between MIN and MAX lines. Replace fluid if discolored or if level is low.
4. Coolant: Check level in reservoir (if equipped with liquid cooling on some models).

Tip: Dispose of used fluids properly at a designated recycling center.

Tire Care and Pressure

Proper tire pressure ensures optimal handling, traction, and tire life.

• Recommended Pressure: Front: 3.6 psi (25 kPa), Rear: 3.6 psi (25 kPa) for standard riding. Adjust for heavy loads or specific terrain.
• Inspection: Check for cuts, punctures, excessive wear, and embedded objects before each ride.
• Tire Replacement: Replace tires when tread depth is worn to 1/4 inch (6 mm) or if damage is found.

WARNING! Never exceed the maximum pressure listed on the tire sidewall. Under-inflation can cause tire failure.

Storage Procedures

Proper storage prevents fuel system issues and corrosion.

1. Clean the ATV thoroughly.
2. Change the engine oil and filter.
3. Add fuel stabilizer to a full tank of fuel and run the engine for 5 minutes.
4. Disconnect the battery negative (-) terminal and store battery in a cool, dry place.
5. Inflate tires to recommended pressure and block the ATV off the ground.
6. Store in a dry, well-ventilated area, covered with a breathable cover.

CAUTION! Do not store with fuel in the carburetor bowl without stabilizer, as it can varnish and clog jets.

Safety Information

ATVs can be hazardous to operate. Always follow these rules:

• Always wear a helmet, goggles, gloves, long sleeves, long pants, and over-the-ankle boots.
• Never operate on public roads or paved surfaces.
• Never carry passengers.
• Never operate under the influence of alcohol or drugs.
• Ride only on designated trails and areas suitable for your skill level.
• Supervise riders under 16 years old; the Grizzly 350 is for riders 16 and older.
• Complete a training course. For info, call the ATV Safety Institute at 1-800-887-2887.

Troubleshooting

Service: For complex repairs, consult an authorized Yamaha dealer. Use genuine Yamaha parts.

Support: Yamaha Customer Relations: 1-800-962-7926 or visit www.yamahamotorsports.com.