Yamaha Grizzly 125 Manual

The Yamaha Grizzly 125 is a compact, all-terrain vehicle (ATV) designed for youth and entry-level riders. It features a 125cc 4-stroke engine, automatic transmission with reverse, electric start, independent rear suspension, and a durable chassis. This manual covers essential information for safe operation, maintenance, troubleshooting, and specifications to ensure optimal performance and longevity of your ATV.

1. Features at a Glance 2. Pre-Ride Inspection 3. Controls and Operation 4. Specifications 5. Maintenance Schedule 6. Basic Maintenance Procedures 7. Storage Guidelines 8. Safety Information 9. Warranty & Support 10. Troubleshooting

Features at a Glance

Key components: 125cc 4-stroke engine, Automatic CVT transmission with reverse, Electric start, Independent rear suspension, Front and rear hydraulic disc brakes, Digital instrument panel.

Feature	Description
Engine	125cc, air-cooled, 4-stroke, SOHC
Transmission	Automatic CVT with forward, neutral, reverse
Starting System	Electric start with auxiliary recoil backup
Suspension	Independent double wishbone (front), Independent rear swingarm
Brakes	Hydraulic disc brakes front and rear
Tires	ATV-specific knobby tires
Fuel Capacity	2.6 gallons (10 liters)
Load Capacity	Includes rider, cargo, and accessories
Instrumentation	Digital display: speedometer, odometer, trip meter, gear indicator, fuel gauge
Safety	Speed limiter, throttle limiter for beginner riders

Pre-Ride Inspection

Always perform a pre-ride inspection to ensure safe operation.

Check fuel level: Ensure adequate fuel for your ride.
Inspect tires: Check pressure and look for damage or excessive wear.
Test brakes: Verify front and rear brakes function properly.
Check controls: Throttle, brake levers, and switches should operate smoothly.
Verify lights: Headlights, taillights, and brake lights must be functional.
Check oil level: Use dipstick to verify engine oil is at correct level.

WARNING! Never operate the ATV if any component is damaged or malfunctioning. Repair before riding.

Controls and Operation

Familiarize yourself with all controls before starting the engine.

Starting: Set parking brake. Turn key to ON. Ensure transmission is in NEUTRAL. Press electric start button.
Driving: Release parking brake. Select FORWARD. Apply throttle gradually to move.
Stopping: Release throttle, apply brakes evenly, come to complete stop.
Reverse: Come to complete stop. Select REVERSE. Apply throttle cautiously.
Parking: Stop on level ground. Engage parking brake. Turn key to OFF.

CAUTION! Always wear appropriate safety gear: helmet, eye protection, gloves, long sleeves, long pants, and over-the-ankle boots.

Specifications

Engine Type: 4-stroke, SOHC, air-cooled
Displacement: 125cc
Bore x Stroke: 54.0 mm x 54.0 mm
Compression Ratio: 9.5:1
Fuel System: Carburetor
Ignition System: CDI
Transmission: Automatic CVT, forward/reverse
Final Drive: Shaft drive
Suspension Front/Rear: Independent double wishbone / Independent swingarm
Brakes Front/Rear: Hydraulic disc / Hydraulic disc
Tires Front/Rear: AT20 x 7-8 / AT20 x 10-8
Dimensions (LxWxH): 68.9 in x 41.7 in x 42.5 in (1750 mm x 1060 mm x 1080 mm)
Ground Clearance: 5.1 in (130 mm)
Fuel Capacity: 2.6 gal (10 L)
Curb Weight: 386 lbs (175 kg)

Maintenance Schedule

Regular maintenance is crucial for safety and performance. Refer to the chart below (intervals in miles/kilometers or months).

Item	Initial (20 mi/1 mo)	Every 100 mi/6 mo	Every 300 mi/12 mo
Engine oil & filter	✓	✓	✓
Air filter	Inspect	Clean/Replace	✓
Spark plug	Inspect	Inspect	Replace
Brake fluid	Inspect	Inspect	Replace*
Drive shaft oil	✓	-	✓
Tire pressure/wear	✓	✓	✓
Nuts & bolts	✓	✓	✓
Throttle operation	✓	✓	✓

*Or as needed. ✓ = Perform service.

Basic Maintenance Procedures

Engine Oil Change: Run engine to warm oil. Place drain pan under drain plug. Remove plug and drain oil. Replace filter. Refill with recommended oil (SAE 10W-30). Check level with dipstick.

Air Filter Service: Remove seat and side panel. Open airbox. Remove filter. Clean with solvent if foam, tap out dust if paper. Re-oil foam filter lightly. Reinstall.

Spark Plug: Remove spark plug cap. Clean area. Use socket to remove plug. Check gap (0.028-0.031 in / 0.7-0.8 mm). Replace if worn.

Tip: Always use genuine Yamaha parts or equivalents specified in this manual.

Storage Guidelines

For long-term storage (over 30 days):

Change engine oil and filter.
Fill fuel tank and add fuel stabilizer. Run engine for 5 minutes.
Remove spark plug, add a teaspoon of oil into cylinder, crank engine, reinstall plug.
Clean entire ATV thoroughly.
Inflate tires to recommended pressure. Lift ATV to take weight off tires if possible.
Disconnect battery negative terminal. Store battery in a cool, dry place.
Store in a cool, dry place away from direct sunlight.

CAUTION! Gasoline is extremely flammable. No smoking. Work in a well-ventilated area.

Safety Information

This ATV is for off-road use only by operators 16 years and older (or as per local laws). Never carry passengers. Avoid paved surfaces. Ride only on designated trails. Never operate under the influence of alcohol or drugs. Complete a training course. Supervise young or inexperienced riders. The Grizzly 125 is not a toy and can be hazardous if misused.

Warranty & Support

Yamaha Motor Corporation, U.S.A. provides a limited warranty. See your dealer for details. For technical support, parts, or dealer locations, visit www.yamahamotorsports.com or contact Yamaha Customer Relations at 1-800-962-7926. Always provide your ATV's model name (Grizzly 125) and Vehicle Identification Number (VIN).

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel valve off, out of fuel, dead battery, faulty spark plug	Turn fuel ON, refuel, charge/replace battery, check/replace spark plug.
Engine starts but dies	Clogged fuel filter, dirty carburetor, stale fuel	Replace fuel filter, clean carburetor, drain old fuel.
Poor performance/loss of power	Dirty air filter, old spark plug, low compression	Clean/replace air filter, replace spark plug, check compression.
ATV pulls to one side	Uneven tire pressure, misalignment, worn tire	Adjust tire pressure, check alignment, replace tire.
Brakes feel spongy or weak	Air in brake lines, low brake fluid, worn pads	Bleed brakes, refill fluid, inspect/replace brake pads.
Unusual noise from engine	Low oil, loose components, internal wear	Check oil level, tighten bolts, consult a Yamaha dealer.

Note: For complex repairs, consult an authorized Yamaha service dealer.

Emergency: In case of accident or fire, move to a safe distance and call emergency services.