Yamaha YFM4FGX Grizzly 400 2008 Owner's Manual

Yamaha YFM4FGX Grizzly 400 2008 manual cover

Pages 172

Year 2008

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Yamaha YFM4FGX Grizzly 400 2008 Specification

The Yamaha YFM4FGX Grizzly 400, released in 2008, is a robust all-terrain vehicle (ATV) engineered for both rugged outdoor adventures and practical utility tasks. It features a 401cc air/oil-cooled, SOHC, four-stroke engine, delivering reliable power and performance across diverse terrains. The Ultramatic V-belt transmission system ensures seamless automatic shifting, complemented by the On-Command 2WD/4WD system for flexible drivetrain control, enhancing traction and maneuverability.

The Grizzly 400's suspension system comprises an independent double wishbone setup with five-way preload-adjustable shocks, providing 6.3 inches of travel at the front and 7.1 inches at the rear. This design offers superior ride comfort and stability over uneven surfaces. The ATV is equipped with hydraulic disc brakes on all four wheels, ensuring responsive and dependable stopping power.

Constructed with a durable steel frame, the YFM4FGX has a compact yet sturdy build, with dimensions of 81.1 inches in length, 42.5 inches in width, and 45.3 inches in height. The vehicle's ground clearance stands at 10.8 inches, facilitating navigation over obstacles. Its fuel tank capacity is 4.0 gallons, enabling extended operation between refuels.

The Grizzly 400 is designed with convenience features, including a digital LCD multifunction display that provides essential information such as speed, fuel level, and hours of operation. Its towing capacity is rated at 1,322 pounds, and the ATV is fitted with front and rear cargo racks, each capable of carrying 66 pounds and 143 pounds, respectively.

Overall, the Yamaha YFM4FGX Grizzly 400 2008 is a versatile and reliable ATV, combining robust performance, advanced handling capabilities, and practical features to meet the demands of both recreational riders and work-oriented users.

Yamaha YFM4FGX Grizzly 400 2008 F.A.Q.

What is the recommended oil type for the Yamaha YFM4FGX Grizzly 400 2008?

The recommended oil type for the Yamaha YFM4FGX Grizzly 400 2008 is SAE 10W-40, API service type SJ or higher. Ensure it's specifically for 4-stroke engines.

How do I troubleshoot starting issues with my Yamaha Grizzly 400?

If your Yamaha Grizzly 400 won't start, check the battery for charge, inspect the spark plug for fouling, ensure there is fuel, and look over the starter relay and fuses for any faults.

What is the proper way to clean the air filter on a Grizzly 400?

Remove the air filter from the airbox, wash it with mild soap and water, let it dry completely, and apply a thin layer of air filter oil before reinstalling.

How often should I change the oil in my Yamaha Grizzly 400?

It is recommended to change the oil every 6 months or 100 hours of operation, whichever comes first.

What tire pressure should be maintained in the Grizzly 400?

Maintain a tire pressure of 4 psi (27.6 kPa) in the front tires and 4.4 psi (30.3 kPa) in the rear tires for optimal performance.

How do I adjust the idle speed on my Yamaha Grizzly 400?

To adjust the idle speed, locate the idle adjustment screw on the carburetor, and turn it clockwise to increase idle speed or counterclockwise to decrease it, aiming for an idle speed of 1,450–1,550 RPM.

What could cause my Grizzly 400 to overheat?

Possible causes of overheating include low coolant levels, a blocked radiator, a faulty thermostat, or clogged radiator fins. Regularly check and maintain coolant levels and clean the radiator.

How can I improve the battery life of my Yamaha Grizzly 400?

To improve battery life, keep the terminals clean, fully charge the battery before storage, use a battery maintainer during long periods of inactivity, and ensure all electrical systems are off when not in use.

What is the correct procedure for changing the brake pads on a Grizzly 400?

To change the brake pads, lift the ATV and remove the wheel, unscrew the caliper bolts, slide out the old pads, insert new pads, and reassemble in reverse order. Ensure all bolts are tightened securely.

How do I maintain the drivetrain on my Yamaha Grizzly 400?

Regularly inspect the drive belt for wear and tension, lubricate the drive shaft splines, and check for any debris or damage to the drivetrain components. Replace any worn parts promptly to prevent further damage.