Yamaha YFM40FBB, YFM40FBHB Big Bear 400 2012 Owner's Manual

Yamaha YFM40FBB, YFM40FBHB Big Bear 400 2012 manual cover
Pages 156
Year 2012
Language(s)
English en

Yamaha YFM40FBB, YFM40FBHB Big Bear 400 2012 Specification

The 2012 Yamaha YFM40FBB and YFM40FBHB Big Bear 400 are robust all-terrain vehicles (ATVs) designed for both recreational and utility purposes. These models are powered by a 386cc, air/oil-cooled, SOHC, 2-valve, single-cylinder engine, delivering reliable performance across diverse terrains. The engine is paired with a five-speed manual transmission system, which includes an automatic clutch and a reverse gear, providing versatility and ease of operation.

The Big Bear 400 features a durable steel frame and a double-wishbone front suspension system with 5.7 inches of travel, coupled with a swingarm rear suspension that offers 5.9 inches of travel. This suspension setup ensures a smooth ride and effective shock absorption. The ATV is equipped with hydraulic front disc brakes and a sealed, oil-bathed, multi-disc rear brake, delivering consistent and reliable stopping power.

Designed with utility in mind, the Big Bear 400 includes a front and rear cargo rack with a combined capacity of 264 pounds, allowing users to transport equipment and supplies easily. The fuel tank has a capacity of 3.8 gallons, providing ample range for extended use. The ATV's overall dimensions are 78.1 inches in length, 42.7 inches in width, and 44.1 inches in height, with a wheelbase of 48.4 inches and a ground clearance of 9.5 inches, ensuring stability and maneuverability.

Additional features include a full-length skid plate, a digital instrument panel, and a comfortable seat designed for extended rides. The YFM40FBB and YFM40FBHB models also come with a 12V accessory outlet, enhancing their practicality for various tasks. With its blend of power, durability, and utility-focused design, the 2012 Yamaha Big Bear 400 remains a reliable choice for ATV enthusiasts and professionals alike.

Yamaha YFM40FBB, YFM40FBHB Big Bear 400 2012 F.A.Q.

How do I perform regular maintenance on my Yamaha Big Bear 400 2012?

To perform regular maintenance, check and change the oil every 1,000 miles or as needed. Inspect the air filter and clean or replace it if necessary. Also, ensure that the brake system is functioning properly and lubricate all moving parts. Regularly check tire pressure and inspect for any wear or damage.

What type of oil is recommended for the Yamaha Big Bear 400 2012?

The recommended oil for the Yamaha Big Bear 400 2012 is Yamalube 4-stroke oil or any high-quality SAE 10W-40 engine oil designed for ATVs. Always consult the user manual for specifics regarding your operating environment.

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

If the ATV won't start, check the battery connections for corrosion or looseness, and ensure the battery is charged. Inspect the spark plug for fouling or wear and replace it if necessary. Also, check the fuel level and fuel line for clogs or leaks.

What should I do if the Yamaha Big Bear 400 overheats?

If your ATV overheats, turn it off immediately and allow it to cool. Check the coolant level and top it up if needed. Inspect the radiator for blockages or debris and ensure the cooling fan is operational. If the problem persists, consult a professional technician.

How do I adjust the suspension on the Yamaha Big Bear 400 2012?

To adjust the suspension, locate the adjustment knobs on the shock absorbers. Turn the knobs clockwise to increase stiffness or counterclockwise to decrease it. Make adjustments gradually and test the ride quality to achieve your preferred comfort level.

What is the proper procedure for cleaning the air filter on the Yamaha Big Bear 400?

To clean the air filter, remove it from the airbox and gently wash it with a mixture of soap and water. Allow it to dry completely before applying a light coat of air filter oil. Reinstall the filter securely to ensure proper engine performance.

How do I check the brake fluid level on my Yamaha Big Bear 400 2012?

To check the brake fluid level, locate the brake fluid reservoir near the handlebars. Ensure the ATV is on a level surface, then remove the cap and inspect the fluid level. It should be between the minimum and maximum marks. Top up with the recommended brake fluid if necessary.

What should I do if the Yamaha Big Bear 400's lights are not working?

If the lights are not working, first check the fuses and replace any that are blown. Inspect the wiring connections for any signs of damage or corrosion. Ensure the bulbs are not burnt out and replace them if necessary.

How can I improve fuel efficiency on my Yamaha Big Bear 400 2012?

To improve fuel efficiency, ensure the air filter is clean and the tires are properly inflated. Regularly maintain the engine by checking spark plugs and changing the oil. Avoid excessive idling and aggressive driving to maximize fuel economy.

What are common signs of transmission issues on the Yamaha Big Bear 400?

Common signs of transmission issues include difficulty shifting gears, unusual noises during operation, and the ATV slipping out of gear. If you experience these symptoms, inspect the transmission fluid level and condition, and consult a professional technician for further diagnosis.