Yamaha Grizzly 350 ATV Manual

The Yamaha Grizzly 350 is a rugged, all-terrain vehicle designed for utility and recreational use. It features a 348cc, 4-stroke, liquid-cooled engine, Ultramatic automatic transmission with engine braking, On-Command 2WD/4WD with differential lock, independent double-wishbone front suspension, and a durable chassis. This manual covers safety, operation, maintenance, specifications, and troubleshooting to ensure safe and optimal performance.

Features at a Glance

Key components: 348cc engine, Ultramatic transmission, On-Command 4WD system, front and rear racks, digital instrument panel, and tow hitch.

Pre-Ride Inspection

Always perform a pre-ride check before operating the ATV.

1. Check fuel level and add fresh gasoline if needed.
2. Inspect tires for proper pressure and damage.
3. Verify all lights and indicators are functional.
4. Check brake lever and pedal operation.
5. Ensure throttle moves smoothly and returns freely.
6. Check oil level and coolant level (if equipped).
7. Look for loose bolts, leaks, or damaged parts.

WARNING! Never operate an ATV without proper inspection. Failure to do so may result in accident or injury.

Controls and Operation

Familiarize yourself with all controls before riding.

1. Starting: Set parking brake. Turn key ON. 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. 4WD Engagement: Use On-Command switch to select 2WD or 4WD. Engage diff lock only at low speeds on slippery surfaces.
4. Braking: Use both front and rear brakes together for controlled stops.
5. Parking: Stop on level ground. Engage parking brake. Shift to Park (P) or Neutral (N). Turn key OFF.

CAUTION! Always wear a helmet, eye protection, and protective clothing. Never carry passengers unless ATV is specifically designed for it.

Specifications

• Model: Yamaha Grizzly 350 (YFM35F)
• Engine Type: 4-stroke, liquid-cooled, SOHC
• Displacement: 348cc
• Bore x Stroke: 83.0 mm x 64.5 mm
• Compression Ratio: 9.2:1
• Fuel System: Mikuni BSR33 carburetor
• Ignition: DC-CDI
• Starting System: Electric starter
• Transmission: Ultramatic automatic V-belt
• Drive System: Shaft drive
• Suspension Travel (Front/Rear): 6.7 in / 7.9 in
• Ground Clearance: 10.8 in
• Dry Weight: 551 lbs (250 kg)
• Dimensions (LxWxH): 81.1 in x 46.1 in x 47.6 in

Maintenance Schedule

Regular maintenance is crucial for longevity and safety. Refer to the table below for intervals (whichever comes first).

Fluid Checks & Changes

Use only Yamaha-recommended fluids.

1. Engine Oil: Check with ATV on level ground. Warm up engine, then turn off. Remove dipstick, wipe, reinsert, and check level. Add Yamalube 4 (10W-30) if low. Change oil and filter every 100 hours or 1500 miles.
2. Coolant: Check level in reservoir when engine is cold. Add Yamaha Coolant or equivalent 50/50 mix if low.
3. Front Differential Oil: Check level at fill plug. Use SAE 80W-90 API GL-5 gear oil.
4. Brake Fluid: Check level in master cylinder reservoirs. Use DOT 4 brake fluid.

WARNING! Engine and fluids are hot after operation. Allow to cool before servicing.

Tire & Wheel Care

Maintain proper tire pressure for handling and tire life.

• Recommended Pressure: Front: 3.6 psi (25 kPa); Rear: 3.6 psi (25 kPa) for standard loads. 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 less than 1/8 inch (3 mm) or if damaged.
• Wheel Installation: Tighten lug nuts to specified torque (40 ft-lb / 54 Nm) in a crisscross pattern.

CAUTION! Under-inflated or over-inflated tires can cause poor handling, overheating, or failure.

Storage Procedures

Proper storage prevents deterioration during periods of non-use.

1. Clean the ATV thoroughly.
2. Change engine oil and filter.
3. Add fuel stabilizer to a full tank of gas and run engine for 5 minutes.
4. Remove spark plug, add a teaspoon of oil into cylinder, and crank engine slowly. Reinstall plug.
5. Disconnect battery negative terminal and store battery in a cool, dry place on a tender.
6. Inflate tires to recommended pressure and block ATV off the ground.
7. Store in a cool, dry place away from sunlight and moisture.

Safety Information

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

• Always wear an approved helmet, goggles, gloves, long sleeves, long pants, and over-the-ankle boots.
• Never operate under the influence of alcohol or drugs.
• Never carry a passenger on a single-rider ATV.
• Ride only on designated trails at safe speeds appropriate for conditions.
• Never attempt wheelies, jumps, or stunts.
• Be extra careful on difficult terrain. Use 4WD and diff lock when needed.
• Complete a training course. Supervise riders under 16.

WARNING! FAILURE TO FOLLOW INSTRUCTIONS COULD RESULT IN SERIOUS INJURY OR DEATH.

Warranty & Support

Yamaha Motor Corporation, U.S.A. provides a limited warranty. Refer to your warranty booklet for specific terms and duration.

For technical support, parts, or service:

• Contact an authorized Yamaha ATV dealer.
• Yamaha Customer Relations: 1-800-962-7926
• Website: www.yamahamotorsports.com

Always use genuine Yamaha parts and accessories to maintain performance and warranty coverage.

Troubleshooting

Note: For complex electrical or mechanical issues, consult an authorized Yamaha service technician.

Service: 1-800-962-7926; www.yamahamotorsports.com