TRX400EX 2007

The Yamaha TRX400EX is a popular ATV model that was first introduced in 2007. While it has many strengths, there are also some common problems that owners may encounter. In this answer, we will discuss some of the most frequently reported issues with the TRX400EX 2007.

Engine Problems

One of the most common problems with the TRX400EX 2007 is engine-related issues. Some owners have reported experiencing difficulty starting the engine, especially when the ATV has been sitting for a long time or in cold weather. This problem can be caused by a faulty starter motor or a weak battery.

Another issue that some owners have encountered is overheating. This can be caused by a clogged radiator or a faulty cooling fan. If not addressed, overheating can lead to serious engine damage.

Transmission Issues

Some TRX400EX 2007 owners have reported transmission problems, such as slipping or hesitation when shifting gears. These issues  can be caused by worn-out clutch packs or a faulty transmission solenoid.

Electrical System Issues

The electrical system of the TRX400EX 2007 is another area where problems can occur. Some owners have reported issues with the charging system, which can cause the battery to drain quickly. This can be caused by a faulty alternator or a damaged wiring harness.

Additionally, some owners have experienced issues with the ATV’s lights and other electrical accessories. For example, the headlights may not work properly or the turn signals may not function at all. These problems can be caused by a faulty wiring harness or a blown fuse.

Suspension and Steering Issues

The suspension and steering systems of the TRX400EX 2007 can also experience problems. Some owners have reported issues with the front end of the ATV, such as excessive play in the steering or a loose front end. These problems can be caused by worn-out bushings or a damaged steering stabilizer.

Additionally, some owners have reported issues with the rear suspension, such as a sagging or bottoming out. These problems can be caused by worn-out shock absorbers or a damaged swingarm.

Brakes

Finally, some TRX400EX 2007 owners have reported issues with the brakes. For example, the brake pads may wear out quickly or the brake lines may become damaged. These problems can be caused by improper maintenance or a faulty brake system.

In conclusion, the TRX400EX 2007 is generally a reliable ATV, but like any machine, it can experience problems from time to time. By being aware of these common issues, owners can take steps to prevent them or address them before they become more serious. Regular maintenance and inspections can go a long way in keeping the TRX400EX running smoothly for years to come.

References:

1. Yamaha TRX400EX Service Manual (2007) – This manual provides detailed information on maintaining and repairing the TRX400EX 2007. It includes troubleshooting guides and repair procedures for common issues.
2. ATV Rider – “Yamaha TRX400EX Review” – This article provides an overview of the TRX400EX 2007, including its features and performance. It also mentions some of the common problems that owners may encounter.
3. ATV Forum – “TRX400EX 2007 Common Problems” – This thread on the ATV Forum discusses some of the common issues that owners of the TRX400EX 2007 have experienced. It provides a platform for owners to share their experiences and ask questions about their ATVs.