Yamaha big bear 400 Problems: Solutions with Proper Maintenance

The Yamaha Big Bear 400 is a popular ATV known for its ruggedness and versatility. It is designed to tackle a wide range of off-road terrain, from rocky hillsides to muddy bogs. Whether you’re a seasoned off-road enthusiast or just starting out, the Yamaha Big Bear 400 is an excellent choice for your next adventure on the trails.

Maintaining an off-road vehicle like the Yamaha Big Bear 400 is crucial to keep it running efficiently. However, despite regular maintenance, common issues can still arise. These problems can range from electrical and carburettor problems to transmission and brake problems. It’s important to be aware of these symptoms, such as difficulty starting or shifting gears, so that you can troubleshoot and repair them promptly. 

Here we’ll discuss the top five common Yamaha Big Bear 400 problems and solutions, including carburettor, electrical, transmission, brake, and starting problems. Scroll down for necessary measures.

Yamaha Big Bear 400 Problems

About Yamaha Big Bear 400

The Yamaha Big Bear 400 is a popular all-terrain vehicle (ATV) that has been in production for over two decades. ATV enthusiasts love it for its durability, reliability, and versatility, making it a favourite. The Big Bear 400 features a powerful engine, four-wheel drive, and an advanced suspension system that can handle even the most challenging terrain. It also has a comfortable seat and ergonomic controls, making it easy to handle for riders of all skill levels.

The Big Bear 400 is prominent for a robust suspension system that can easily handle tough off-road terrain. It also has a large fuel tank and ample storage space, making it perfect for long trips or hauling equipment. The Big Bear 400 comes equipped with a powerful air-cooled engine, a four-wheel drive system, and independent suspension, which helps to provide a smooth ride even over rough terrain. 

Whether you are using it for hunting, farming, or recreational riding, the Yamaha Big Bear 400 is a dependable and capable ATV that can handle almost anything you throw at it.

Top 5 Common Yamaha Big Bear 400 Problems And Their Solutions

Yamaha Big Bear 400

Regarding the Yamaha Big Bear 400, there are a few common problems that owners should be aware of. Overheating is one such issue that can occur due to a clogged radiator or faulty thermostat. Starting problems may also arise, usually caused by a weak battery or faulty starter motor. Transmission problems like slipping gears or difficulty shifting can occur, along with electrical issues affecting headlights and taillights. Carburettor problems leading to poor performance or stalling are also common. However, If you own a Yamaha Big Bear 400, it’s important to be aware of the most common problems that may arise. Here are the top five issues that Big Bear 400 owners may face, as well as some potential solutions:

Yamaha Big Bear 400 Carburetor Issues

If you own a Yamaha Big Bear 400, you may have experienced issues with the carburettor. The carburettor is responsible for mixing air and fuel in the engine to create combustion, which is an essential component of your ATV. Some common issues with the carburettor include clogging, leaking, or improper functioning. Fortunately, some solutions to these problems can get your ATV back up and running smoothly.

One solution is to clean the carburettor to remove any debris or buildup causing clogs or leaks. Another solution is to replace the carburettor entirely if the cleaning does not work or is too damaged. It is important to make sure that any replacement parts are compatible with your specific model of Yamaha Big Bear 400.

While carburettor issues can be frustrating, they can be resolved with proper maintenance and care. By keeping your ATV in good shape and addressing any issues as soon as they arise, you can enjoy many more miles of outdoor adventures on your Yamaha Big Bear 400.

Yamaha Big Bear 400

Yamaha Big Bear 400 Electrical Issues

The Yamaha Big Bear 400 is a powerful ATV but can experience electrical problems like any vehicle. Weak batteries, faulty starter motors, and malfunctioning ignition systems are common issues that can arise. 

However, regular maintenance and inspections can help prevent these problems from occurring. One solution to a weak battery is to replace it with a high-quality, maintenance-free battery that can handle the demands of the ATV.

 If the starter motor is faulty, it may be necessary to repair or replace it with a new one. And if the ignition system is acting up, cleaning or replacing the spark plug, ignition coil, or CDI box may help resolve the problem.

Yamaha Big Bear 400 Transmission Issues

Yamaha Big Bear 400 is a robust and reliable ATV but can experience transmission problems like any other vehicle. One of the most common issues with this model is shifting difficulties and gear slipping. These problems can make manoeuvring the ATV challenging or even dangerous if addressed. 

The solution to these issues often lies in replacing worn-out clutch plates or adjusting the clutch cable. Regular maintenance and proper use can also prevent transmission problems from occurring in the first place. If you are experiencing transmission issues with your Yamaha Big Bear 400, it’s important to address them promptly to ensure your safety and prolong the life of your vehicle.

Yamaha Big Bear 400 Brake Issues

One of the most common issues Yamaha Big Bear 400 owners face is brake problems. The causes behind these problems can vary, but one of the most frequently observed is worn-out brake pads. 

When you notice a decrease in braking power or hear unusual noises while applying the brakes, it’s usually a sign that your brake pads need replacing. Another issue with the brakes on your Big Bear 400 is the sticking calliper, which can result in uneven wear on both the brake pads and rotors. Regularly maintaining and lubricating the calliper pins can help prevent this from happening.

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Yamaha Big Bear 400 Starting Issue

Starting problems can be a frustrating issue for Yamaha Big Bear 400 owners. If you struggle to get your vehicle started, several potential culprits exist. Often, starting problems are caused by a dead battery, clogged fuel filter, or faulty starter motor. Regular maintenance can help prevent these issues from occurring in the first place. Still, if you experience starting problems, diagnosing and fixing them promptly is important to avoid further damage to your vehicle.

To resolve starting problems, start by checking and replacing the battery if necessary. If the battery is fine, cleaning or replacing the fuel filter might be required. Finally, repairing or replacing the starter motor may also be necessary to fix the problem. Proper attention and care allow starting problems to be solved quickly and easily.

Identify & Fix Yamaha Big Bear 400 Problems on Your Own

Maintaining your Yamaha Big Bear 400 is crucial to avoid issues down the line. However, even with regular maintenance, problems can still arise. In such a situation, knowing how to navigate common issues with simple DIY solutions can save you both time and money. From cleaning the carburettor to replacing spark plugs, taking care of your vehicle’s basic needs can prevent bigger problems from occurring in the future. Remember always to use high-quality replacement parts and consult a professional if needed. When fixing Yamaha Big Bear 400 problems, a few tips and tricks can be useful. 

  • First, checking the fuel system for any clogs or leaks causing issues is important. 
  • Additionally, inspecting the battery and electrical system for any malfunctions is crucial. Other potential culprits include worn-out parts such as spark plugs and air filters. 
  • It’s also essential to keep up with regular maintenance to prevent future problems from occurring. 
  • Lastly, high-quality replacement parts are vital for long-term durability when fixing any issues. 

Following these tips and tricks ensures that your Yamaha Big Bear 400 runs smoothly for years.

Yamaha Big Bear 400

Importance of Regular Maintenance for Yamaha Big Bear 400

Maintaining your Yamaha Big Bear 400 through regular maintenance is essential for avoiding problems and ensuring the ATV’s longevity. The manufacturer recommends various maintenance tasks, including oil changes, air filter replacements, and brake inspections. Failure to perform these tasks can lead to issues such as engine overheating and transmission failure. It’s important to adhere to the recommended schedule, as regular maintenance can save you money in costly repairs and help keep your ATV running smoothly for years to come. Here are some important maintenance tips to keep in mind:

  • Change the oil regularly. This will help prevent engine damage and ensure the engine runs smoothly.
  • Check the air filter. A dirty air filter can reduce performance and cause damage to the engine. Make sure to clean or replace it as necessary.
  • Keep the tires properly inflated. This will improve handling and reduce wear on the tires.
  • Check the brakes. Make sure that they are functioning properly and replace any worn components.
  • Inspect all electrical connections. Loose or corroded connections can cause problems with starting or running the engine.

By understanding these common issues and taking regular maintenance seriously, you can prevent future problems and extend the lifespan of your Yamaha Big Bear 400.

Frequently Asked Questions

What is the top speed of a Yamaha Big Bear 400?

The top speed of a Yamaha Big Bear 400 can vary depending on several factors. While the manufacturer suggests a top speed of around 50 mph, this may only sometimes be achievable in real-world conditions. Factors affecting the top speed include the terrain, rider weight, and vehicle maintenance. Always riding safely and within your limits, regardless of the maximum achievable speed, is essential.

Is the Yamaha Big Bear 400 automatic?

Yes, the Yamaha Big Bear 400 is available in automatic and manual transmission options. The automatic version comes equipped with Yamaha’s Ultramatic transmission system, which provides smooth shifting and precise throttle control. On the other hand, the manual version of the Yamaha Big Bear 400 has a five-speed gearbox.

How much does a 2012 Yamaha Big Bear 400 weigh?

A 2012 Yamaha Big Bear 400 weighs approximately 600 pounds, although this may vary depending on the specific model and any added accessories. It’s important to consider the vehicle’s weight when transporting or storing it and how it may affect its performance and fuel efficiency.

Is Yamaha Big Bear 400 Good?

The Yamaha Big Bear 400 is generally considered a reliable and durable ATV, with a powerful engine that can easily handle tough terrain. However, as with any vehicle, it may have problems or issues. It’s important to thoroughly research and test drive the Yamaha Big Bear 400 before purchasing to ensure it meets your needs and expectations.

What are some common problems that Yamaha Big Bear 400 owners may encounter?

Yamaha Big Bear 400 owners may encounter issues with the carburettor, starter motor, and electrical system. Faulty fuel pumps or clogged fuel filters are also common problems. Suspension and brake problems can arise with regular use of the vehicle. 


Regular maintenance and upkeep are essential to keep your Yamaha Big Bear 400 running smoothly. Ignoring even minor issues can lead to significant problems, resulting in costly repairs or replacements. Some of the most common issues Yamaha Big Bear 400 owners face include carburettor problems, electrical faults, transmission issues, brake failures, and starting problems. 

However, with the right knowledge and tools, you can fix many of these issues yourself. After discussing the various Yamaha Big Bear 400 problems that owners commonly face, it is clear that these issues can be frustrating and time-consuming. However, proper maintenance and care can prevent or resolve many problems quickly. It’s important to stay vigilant and address any issues as soon as they arise to prevent them from becoming more serious problems.

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