2014 Yamaha Grizzly 450 Manual

The 2014 Yamaha Grizzly 450 is a rugged, all-terrain vehicle (ATV) featuring a 421cc liquid-cooled, 4-stroke, SOHC engine, Ultramatic automatic transmission with On-Command 2WD/4WD with differential lock, independent double-wishbone front suspension, IRS rear suspension, disc brakes, electric start, and a towing capacity of 1,212 lbs. Below are key sections for safety, features, operation, maintenance, specifications, and troubleshooting.

1. Features at a Glance 2. Pre-Ride Inspection 3. Operation & Controls 4. Specifications 5. Maintenance Schedule 6. Fluid Capacities 7. Storage & Winterization 8. Safety Precautions 9. Warranty Information 10. Troubleshooting

Features at a Glance

Key components: 421cc engine, Ultramatic transmission, On-Command 2WD/4WD system, independent suspension, front and rear racks, towing hitch.

Feature	Description
Engine	421cc liquid-cooled, 4-stroke, SOHC, 4-valve
Transmission	Ultramatic automatic with engine braking
Drive System	On-Command 2WD/4WD with differential lock
Suspension	Independent double-wishbone front; IRS rear
Brakes	Dual hydraulic disc front; sealed wet multi-disc rear
Fuel Capacity	4.0 gallons (15.1 liters)
Towing Capacity	1,212 lbs (550 kg)
Front Rack Capacity	66 lbs (30 kg)
Rear Rack Capacity	132 lbs (60 kg)
Electric Start	Standard with auxiliary recoil backup

Pre-Ride Inspection

Always perform a pre-ride inspection before operation.

Check fuel level and fuel lines for leaks.
Inspect tires for proper pressure and damage.
Test brakes for proper operation and fluid level.
Check engine oil level and coolant level.
Ensure all lights and indicators are functional.
Verify throttle moves smoothly and returns automatically.

WARNING! Never operate the ATV if any component is damaged or malfunctioning. Always wear appropriate safety gear.

Operation & Controls

Familiarize yourself with all controls before riding.

Starting: Set parking brake. Turn key ON. Shift to Neutral (N). Press brake lever and press start button.
Driving: Release parking brake. Select Forward (F) or Reverse (R). Apply throttle gradually.
On-Command 4WD: Use switch to select 2WD, 4WD, or 4WD with differential lock for maximum traction.
Braking: Use both front and rear brakes together for controlled stops.

CAUTION! Avoid sudden throttle or brake applications. Practice in a safe, open area before challenging terrain.

Specifications

Engine Type: 421cc liquid-cooled, 4-stroke, SOHC, 4-valve.
Bore x Stroke: 86.0mm x 72.5mm.
Compression Ratio: 10.0:1.
Fuel Delivery: Mikuni BSR33 carburetor.
Transmission: Yamaha Ultramatic automatic V-belt with all-wheel engine braking.
Drive System: On-Command 2WD/4WD with diff lock; shaft drive.
Suspension Travel (Front/Rear): 7.1 in / 9.5 in.
Brakes: Dual hydraulic disc front; sealed wet multi-disc rear.
Tires: AT25 x 8-12 front; AT25 x 10-12 rear.
Dry Weight: 617 lbs (280 kg).

Maintenance Schedule

Follow this schedule to ensure longevity and safe operation.

After First 20 hours/100 miles: Change engine oil and filter. Check valve clearance. Inspect brake pads, drive shaft boots, and all fasteners.

Every 100 hours/600 miles: Change engine oil and filter. Clean air filter. Check spark plug. Inspect CVT intake duct and cooling fan. Lubricate all fittings.

Every 200 hours/1200 miles: Change front and rear differential oil. Change brake fluid. Inspect wheel bearings and brake lines.

Fluid Capacities

Use only recommended Yamaha fluids or equivalents.

Engine Oil (with filter change): 2.6 qt (2.5 L).
Front Differential Oil: 0.21 qt (0.20 L).
Rear Differential Oil: 0.32 qt (0.30 L).
Fuel Tank: 4.0 gal (15.1 L).
Coolant: 1.6 qt (1.5 L).

Tip: Check fluid levels when the ATV is on a level surface and the engine is cool.

Storage & Winterization

Proper storage prevents fuel system damage and corrosion.

Clean the ATV thoroughly.
Add fuel stabilizer to a full tank and run engine for 5 minutes.
Change engine oil and filter.
Remove spark plug, add a teaspoon of oil to cylinder, and crank engine slowly before reinstalling plug.
Inflate tires to recommended pressure and elevate off ground.
Store in a cool, dry place and cover with a breathable cover.

WARNING! Do not store with fuel in carburetor bowl; drain or run dry with fuel valve off.

Safety Precautions

Always wear a helmet, eye protection, gloves, long sleeves, long pants, and over-the-ankle boots. Never carry passengers. Avoid paved surfaces. Ride only on designated trails. Never operate under the influence of drugs or alcohol. Complete a training course.

Warranty Information

Yamaha Motor Corporation, U.S.A. provides a 6-month limited warranty for commercial use and a 12-month limited warranty for non-commercial use from the date of purchase. Warranty covers defects in material and workmanship. Normal wear, improper maintenance, or accidents are not covered. For warranty service, contact an authorized Yamaha ATV dealer. Keep your purchase receipt.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel, spark, battery	Check fuel valve, fuel level. Check spark plug. Charge or replace battery.
Loss of power	Clogged air filter, fuel filter	Clean or replace air filter. Check fuel lines and filter.
Overheating	Low coolant, clogged radiator	Check coolant level. Clean radiator fins. Ensure cooling fan operates.
Poor braking	Worn pads, air in lines	Inspect brake pads. Bleed brake lines if spongy.
4WD not engaging	Switch, actuator, fuse	Check On-Command switch. Inspect 4WD actuator. Check related fuses.

Dealer Service: For complex issues, contact an authorized Yamaha Grizzly dealer.

Customer Support: Yamaha Motor Corporation, U.S.A. 1-800-962-7926