Kymco Mxu 700 Problems

The Kymco Mxu 700, a robust and versatile ATV, has carved a niche for itself in the recreational and utility markets. Known for its affordability and reliable performance, it's a popular choice for riders seeking a capable machine without breaking the bank. However, like any vehicle, the Mxu 700 isn't immune to issues. Understanding these potential problems, from minor quirks to more significant mechanical concerns, is crucial for owners to ensure the longevity and optimal performance of their ATV.

Common Complaints: What Mxu 700 Owners Are Talking About

Let's dive into some of the most frequently reported problems encountered by Kymco Mxu 700 owners. Understanding these issues is the first step in troubleshooting and preventing future headaches.

Starting Troubles:

One of the most common complaints revolves around difficulty starting the Mxu 700, especially in cold weather. This can manifest in several ways:

Slow Cranking: The engine turns over sluggishly, often accompanied by a weak battery sound.
No Crank: The engine doesn't turn over at all when the ignition is engaged.
Intermittent Starting: The ATV starts sometimes, but not others, making it unreliable.

Possible causes for these starting issues include:

Weak Battery: The most common culprit. ATV batteries are often subjected to harsh conditions and can lose their charge quickly, particularly in cold weather.
Faulty Starter Solenoid: The solenoid is responsible for delivering power to the starter motor. A failing solenoid can prevent the starter from engaging.
Loose or Corroded Connections: Corroded battery terminals or loose wiring connections can impede the flow of electricity.
Fuel System Issues: Problems with the fuel pump, fuel filter, or fuel injectors can prevent the engine from receiving the necessary fuel for combustion.
Spark Plug Problems: A fouled or worn spark plug can prevent the engine from firing.

Ride Quality and Handling Concerns:

While the Mxu 700 is generally praised for its handling, some owners have reported issues with the ride quality and overall handling characteristics.

Stiff Suspension: The suspension can feel overly firm, especially on rough terrain, leading to a jarring ride.
Excessive Body Roll: The ATV may exhibit excessive body roll during cornering, making it feel unstable.
Steering Issues: Some owners have reported difficulty steering, particularly at low speeds. This can be due to tight steering stem bearings or low tire pressure.
Wobble or Vibration: At higher speeds, some riders experience a wobble or vibration, which can be unsettling.

Possible causes for these issues include:

Incorrect Tire Pressure: Maintaining the correct tire pressure is crucial for optimal handling and ride quality.
Suspension Settings: The suspension may need to be adjusted to suit the rider's weight and riding style.
Worn Suspension Components: Worn shocks, springs, or bushings can negatively impact ride quality and handling.
Wheel Alignment Issues: Improper wheel alignment can cause handling problems and premature tire wear.
Loose Steering Components: Loose tie rod ends or ball joints can lead to steering problems.

Electrical Gremlins:

Electrical problems can be frustrating to diagnose and repair. Here are some common electrical issues reported by Mxu 700 owners:

Faulty Lights: Headlights, taillights, or brake lights may fail to function properly.
Dashboard Malfunctions: The instrument panel may display incorrect information or fail to light up.
Charging System Problems: The battery may not charge properly, leading to starting problems.
Fuse Issues: Blown fuses can cause various electrical components to stop working.

Possible causes for these electrical problems include:

Loose or Corroded Connections: Again, a recurring theme in ATV problems!
Faulty Wiring: Damaged or frayed wiring can cause short circuits and electrical malfunctions.
Bad Ground Connections: Poor ground connections can impede the flow of electricity.
Faulty Voltage Regulator: The voltage regulator controls the charging voltage. A failing regulator can damage the battery or other electrical components.
Faulty Stator: The stator generates the electricity that charges the battery. A failing stator can lead to charging problems.

Braking System Concerns:

The braking system is essential for safety. Any problems with the brakes should be addressed immediately.

Weak Brakes: The brakes may not provide adequate stopping power.
Squealing Brakes: The brakes may make a loud squealing noise when applied.
Spongy Brakes: The brake lever may feel spongy or soft.
Leaking Brake Fluid: Brake fluid leaks can compromise the braking system's performance.

Possible causes for these braking issues include:

Worn Brake Pads: Worn brake pads reduce braking effectiveness.
Air in the Brake Lines: Air in the brake lines can cause a spongy brake feel.
Low Brake Fluid: Low brake fluid levels can compromise braking performance.
Leaking Brake Calipers or Master Cylinder: Leaks can cause a loss of brake fluid and reduced braking power.
Contaminated Brake Pads: Oil or grease on the brake pads can reduce their effectiveness.

Other Potential Issues:

Beyond the common complaints listed above, some owners have reported other issues, including:

Overheating: The engine may overheat, especially during strenuous use.
Coolant Leaks: Coolant leaks can lead to overheating and engine damage.
Transmission Problems: Shifting problems or unusual noises from the transmission.
Exhaust Leaks: Exhaust leaks can reduce engine performance and create a safety hazard.
CV Joint Problems: Clicking or popping noises from the CV joints, especially when turning.

Digging Deeper: Why These Problems Happen

Understanding why these problems occur is just as important as knowing what they are. Several factors contribute to the issues experienced by Mxu 700 owners:

Wear and Tear: Like any mechanical device, ATVs are subject to wear and tear over time. Regular maintenance is essential to minimize wear and prevent problems.
Operating Conditions: ATVs are often used in harsh conditions, such as mud, water, and extreme temperatures. These conditions can accelerate wear and tear and contribute to mechanical problems.
Maintenance Neglect: Failure to perform regular maintenance, such as oil changes, filter replacements, and lubrication, can lead to a variety of problems.
Manufacturing Defects: While Kymco is generally known for its quality, manufacturing defects can occur in any vehicle.
Improper Use: Using the ATV for purposes it wasn't designed for, such as excessive towing or aggressive riding, can strain components and lead to premature failure.

Proactive Prevention: Keeping Your Mxu 700 Running Smoothly

The best way to deal with Kymco Mxu 700 problems is to prevent them from happening in the first place. Here are some proactive steps you can take:

Follow the Maintenance Schedule: Adhere to the maintenance schedule outlined in the owner's manual. This includes regular oil changes, filter replacements, lubrication, and inspections.
Use Quality Fluids and Parts: Use high-quality oil, coolant, brake fluid, and other fluids that meet the manufacturer's specifications. Similarly, use genuine Kymco parts or reputable aftermarket parts.
Inspect Your ATV Regularly: Conduct regular inspections of your ATV, looking for signs of wear and tear, leaks, or damage. Pay close attention to the tires, brakes, suspension, and electrical system.
Keep Your ATV Clean: Clean your ATV regularly to remove mud, dirt, and debris. This will help prevent corrosion and make it easier to spot potential problems.
Store Your ATV Properly: When not in use, store your ATV in a dry, sheltered location. This will help protect it from the elements and prevent corrosion.
Ride Responsibly: Avoid aggressive riding and excessive towing. Use the ATV for its intended purpose and operate it safely.
Address Problems Promptly: If you notice any problems, address them promptly. Don't wait until a small problem becomes a major issue.

Troubleshooting Tips: Tackling Problems Head-On

Even with the best preventative maintenance, problems can still arise. Here are some troubleshooting tips to help you diagnose and resolve common Mxu 700 issues:

Consult the Owner's Manual: The owner's manual is a valuable resource for troubleshooting common problems.
Use a Multimeter: A multimeter can be used to test electrical circuits and components.
Visually Inspect Components: Carefully inspect components for signs of damage, wear, or leaks.
Listen for Unusual Noises: Pay attention to any unusual noises, such as clicking, popping, or squealing.
Check for Error Codes: Some ATVs have diagnostic systems that display error codes. These codes can help you pinpoint the source of the problem.
Seek Professional Help: If you're not comfortable troubleshooting or repairing your ATV, seek professional help from a qualified mechanic.

Frequently Asked Questions

Why is my Mxu 700 hard to start in cold weather? Cold weather reduces battery performance and thickens engine oil, making it harder for the starter to turn the engine. Consider using a battery tender and ensuring the correct oil viscosity for cold temperatures.
What does it mean when my brakes are squealing? Squealing brakes usually indicate worn brake pads or contamination. Inspect the brake pads for wear and clean them with brake cleaner.
Why is my ATV overheating? Overheating can be caused by low coolant levels, a faulty thermostat, or a clogged radiator. Check the coolant level, inspect the thermostat, and clean the radiator fins.
How often should I change the oil in my Mxu 700? The recommended oil change interval is typically every 100 hours or 6 months, whichever comes first. Always refer to your owner's manual for the specific recommendations for your model.
What type of battery does my Mxu 700 use? The Mxu 700 typically uses a 12-volt AGM (Absorbent Glass Mat) battery. Check your owner's manual for the exact battery specifications.

In Conclusion

While the Kymco Mxu 700 offers a compelling package of affordability and capability, being aware of potential problems is crucial for owners. By understanding common issues, practicing preventative maintenance, and troubleshooting effectively, you can keep your Mxu 700 running smoothly for years to come, maximizing your enjoyment and minimizing downtime. Regular care and attention will help ensure your Kymco Mxu 700 remains a reliable companion on the trails.