Yamaha YFM40FBZ, YFM40FBHZ Big Bear 400 2010 Owner's Manual

Yamaha YFM40FBZ, YFM40FBHZ Big Bear 400 2010 manual cover
Pages 158
Year 2010
Language(s)
English en

Yamaha YFM40FBZ, YFM40FBHZ Big Bear 400 2010 Specification

The 2010 Yamaha YFM40FBZ/YFM40FBHZ Big Bear 400 is a robust all-terrain vehicle (ATV) designed for both utility and recreational use. It features a 386cc, air/oil-cooled, SOHC, single-cylinder, four-stroke engine, providing reliable power and efficiency. The ATV's engine is mated to a five-speed manual transmission with an automatic clutch and a reverse gear, ensuring versatile performance across various terrains. The Big Bear 400 is equipped with a selectable 2WD/4WD system, allowing riders to switch between two-wheel drive and four-wheel drive modes depending on the riding conditions.

The suspension system includes an independent double-wishbone front suspension with 5.7 inches of travel and a swingarm rear suspension with 6.3 inches of travel, providing a smooth and stable ride. The braking system consists of dual hydraulic front disc brakes and a sealed rear drum brake, offering reliable stopping power. With a fuel capacity of 3.8 gallons, including a 1.0-gallon reserve, the Big Bear 400 is well-suited for extended rides.

The ATV has a sturdy steel frame and a durable plastic body, designed to withstand rough conditions. It features a comfortable and ergonomic seat, accommodating long hours of riding. The utility-focused design includes front and rear cargo racks with a substantial carrying capacity, making it ideal for hauling equipment and supplies. The Big Bear 400 also includes a digital LCD display providing essential information such as speed, odometer, trip meter, and fuel gauge.

Overall, the 2010 Yamaha YFM40FBZ/YFM40FBHZ Big Bear 400 combines reliable performance, durability, and versatility, making it a solid choice for both work and play in diverse environments.

Yamaha YFM40FBZ, YFM40FBHZ Big Bear 400 2010 F.A.Q.

How do I perform regular maintenance on my Yamaha YFM40FBZ Big Bear 400?

Regular maintenance includes checking the oil level, inspecting and cleaning the air filter, checking tire pressure, and examining brake pads. Refer to the owner's manual for detailed maintenance schedules and procedures.

What type of oil should I use for my Yamaha YFM40FBHZ Big Bear 400?

It is recommended to use Yamalube 4-Stroke oil or any high-quality 4-stroke engine oil with a viscosity of 10W-40. Ensure the oil meets or exceeds the specifications set in the owner's manual.

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

If your ATV won't start, check the battery charge, ensure the fuel valve is on, verify that the kill switch is in the run position, and inspect the spark plug for wear or damage.

What should I do if my Big Bear 400 stalls during operation?

If your ATV stalls, check the air filter for blockages, ensure the fuel is fresh, and inspect the fuel lines for leaks or clogs. Clean the carburetor if necessary.

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

Locate the idle adjustment screw on the carburetor. Turn it clockwise to increase the idle speed or counterclockwise to decrease it, ensuring the engine runs smoothly at idle.

What steps should I follow to clean the carburetor on my Big Bear 400?

To clean the carburetor, remove it from the engine, disassemble it carefully, clean all parts with carburetor cleaner, ensure all passages are clear, and reassemble it before reinstalling.

How can I check and replace the spark plug on my Big Bear 400?

To check the spark plug, remove it using a spark plug socket, inspect for wear or deposits, and replace it if necessary. Use a new plug with the correct gap as specified in the owner's manual.

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

The recommended tire pressure is typically 4 psi (27.6 kPa) for the front tires and 4 psi (27.6 kPa) for the rear tires. Always refer to the manual for the exact specifications.

How do I maintain the brakes on my Big Bear 400?

Regularly inspect the brake pads for wear, ensure brake fluid is at the correct level, and check for any leaks in the brake lines. Replace brake pads if they are worn beyond the minimum thickness.

How can I improve the battery life of my Big Bear 400?

To improve battery life, keep the terminals clean and tight, avoid deep discharges, and use a trickle charger if the ATV is idle for extended periods. Regularly check the electrolyte level if applicable.