Yamaha YFM400FT Big Bear 400 2005 Owner's Manual

Yamaha YFM400FT Big Bear 400 2005 manual cover

Pages 178

Year 2005

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Yamaha YFM400FT Big Bear 400 2005 Specification

The Yamaha YFM400FT Big Bear 400, released in 2005, is a robust all-terrain vehicle (ATV) designed for versatility and reliability in a variety of environments. It is powered by a 386cc, air/oil-cooled, 4-stroke, single-cylinder engine that delivers a balance of power and fuel efficiency. The engine's SOHC (Single Overhead Camshaft) configuration contributes to its smooth performance and durability. The ATV features a 5-speed transmission with an automatic clutch, providing easy shifting and control, complemented by a reverse gear for added maneuverability.

The Big Bear 400 is built on a sturdy steel frame, ensuring longevity and stability during rigorous use. Its suspension system includes an independent double-wishbone front suspension and a swingarm rear suspension, both equipped with preload-adjustable shocks, which offer a comfortable ride over rough terrain. The braking system consists of dual hydraulic front disc brakes and a sealed rear drum brake, providing reliable stopping power in various conditions.

Equipped with a selectable 2WD/4WD system, the Big Bear 400 allows riders to switch between two-wheel drive for flat, even surfaces and four-wheel drive for more challenging, uneven terrains. This adaptability is further enhanced by its high ground clearance and durable tires, making it capable of tackling obstacles with ease.

The ATV's design includes a spacious cargo rack at the front and rear, enabling it to carry essential gear and supplies. Its ergonomic seating and handlebar design ensure rider comfort during extended use. With a fuel tank capacity of 3.8 gallons, the Big Bear 400 offers ample range for long rides without frequent refueling.

Overall, the Yamaha YFM400FT Big Bear 400 2005 is a well-rounded ATV that combines power, durability, and versatility, making it an ideal choice for both recreational riders and those requiring a reliable vehicle for work-related tasks.

Yamaha YFM400FT Big Bear 400 2005 F.A.Q.

How do I perform regular maintenance on my Yamaha YFM400FT Big Bear 400 2005?

Regular maintenance includes checking and changing the oil, inspecting the air filter, checking tire pressure, and inspecting the brakes and suspension. Refer to the owner's manual for detailed instructions and intervals.

What type of oil should I use for my Yamaha YFM400FT Big Bear 400 2005?

Use a high-quality 4-stroke motor oil, such as 10W-40, that meets or exceeds the specifications listed in the owner's manual.

How can I troubleshoot starting issues with my Yamaha YFM400FT Big Bear 400 2005?

Check the battery connections, ensure the fuel valve is open, inspect the spark plug for fouling or wear, and verify that the kill switch is not engaged.

What should I do if my Yamaha YFM400FT Big Bear 400 2005 is overheating?

Ensure the radiator is clean and free of debris, check coolant levels and top up if necessary, and inspect the fan for proper operation.

How often should I change the air filter on my Yamaha YFM400FT Big Bear 400 2005?

The air filter should be inspected every 20 hours of use and cleaned or replaced as necessary. More frequent checks are recommended if you ride in dusty conditions.

What could cause my Yamaha YFM400FT Big Bear 400 2005 to have poor acceleration?

Possible causes include a clogged air filter, dirty fuel system, worn spark plug, or issues with the carburetor that may require adjustment or cleaning.

How do I adjust the idle speed on my Yamaha YFM400FT Big Bear 400 2005?

Locate the idle adjustment screw on the carburetor and turn it clockwise to increase idle speed or counterclockwise to decrease it, ensuring the engine is warm for an accurate setting.

What are the tire pressure specifications for the Yamaha YFM400FT Big Bear 400 2005?

The recommended tire pressure is 5.0 psi for the front tires and 5.5 psi for the rear tires. Always check the pressure when the tires are cold.

How do I replace the brake pads on my Yamaha YFM400FT Big Bear 400 2005?

To replace the brake pads, lift the ATV, remove the wheel, unbolt the caliper, and slide out the old pads. Install the new pads, ensuring they are properly seated, then reassemble.

What should I do if the electrical system on my Yamaha YFM400FT Big Bear 400 2005 is not functioning?

Check all fuses for continuity, inspect wiring for damage or loose connections, and ensure the battery is charged and in good condition.