The Polaris Sportsman 570 is a popular ATV known for its versatility, affordability, and reliability. However, like any machine, it’s not without its potential issues. Understanding these common problems can help you troubleshoot, maintain your ATV effectively, and ultimately enjoy your off-road adventures without unnecessary headaches.

What’s the Buzz About Sportsman 570 Issues Anyway?

The Sportsman 570 has earned a solid reputation, but some owners have reported experiencing a few recurring issues. These range from minor annoyances to more significant mechanical concerns. Knowing what to look for can empower you to catch potential problems early and prevent them from escalating into costly repairs. Let's dive into the most common complaints and how to address them.

The Dreaded Hot Start Issue: Why Won’t My 570 Start When It’s Warm?

One of the most frequently discussed problems with the Sportsman 570, particularly in earlier models, is the hot start issue. This is when the ATV starts perfectly fine when cold, but refuses to start or struggles to start after it's been running and the engine is hot. This can be incredibly frustrating, especially when you're out on the trail.

Possible Causes and Solutions:

  • Weak Battery: Heat can exacerbate a weak battery's condition. A battery that seems fine when cold may not have enough cranking power when hot. Test your battery's voltage and cold cranking amps (CCA). If it's below specifications, replace it.
  • Faulty Stator: The stator charges the battery while the engine is running. If it's failing, it may not be providing enough charge, leading to a weak battery and hot start issues. A multimeter can be used to test the stator's output.
  • Fuel System Problems: Vapor lock can occur in hot conditions, preventing fuel from reaching the engine. A clogged fuel filter or a failing fuel pump can also contribute to hot start problems. Check the fuel filter for debris and consider testing the fuel pump pressure.
  • Valve Issues: Tight valves can cause compression problems, especially when the engine is hot. This is more common in older models that haven't had regular valve adjustments. A compression test can reveal valve issues. Consult your service manual for proper valve adjustment procedures.
  • Crank Position Sensor (CPS) Failure: The CPS tells the ECU (Engine Control Unit) the position of the crankshaft. A failing CPS can cause intermittent starting problems, especially when hot. Testing the CPS with a multimeter can help diagnose this issue.
  • ECU Issues: In rare cases, the ECU itself can be the culprit. This is usually a last resort diagnosis after ruling out other possibilities.

EPS Troubles: When Your Power Steering Goes on Vacation

The Electronic Power Steering (EPS) is a fantastic feature that makes the Sportsman 570 much easier to handle, especially on rough terrain. However, the EPS system can sometimes experience issues.

Common EPS Problems and Fixes:

  • EPS Light On: This indicates a problem with the EPS system. It could be a sensor issue, a wiring problem, or a fault within the EPS unit itself. Check the error code displayed on the dashboard. This code will provide valuable information about the source of the problem.
  • Loss of Power Steering: The EPS may suddenly stop working, making the ATV much harder to steer. This could be due to a blown fuse, a loose connection, or a failing EPS unit. Start by checking the EPS fuse. Then, inspect the wiring harness for any damage or loose connections.
  • Intermittent EPS Failure: The EPS may work sometimes and not others. This can be a sign of a failing EPS unit or a loose connection. Carefully inspect the wiring harness and connectors for corrosion or damage.

The Mysterious Clicking Noise: What’s That Sound?

Many Sportsman 570 owners have reported hearing a clicking noise, often from the rear of the ATV, particularly when accelerating or decelerating. This can be unsettling, but it's often a relatively simple fix.

Possible Causes of the Clicking Noise:

  • Worn CV Joints: The CV joints (Constant Velocity joints) are responsible for transferring power to the wheels. When they wear out, they can start to click, especially during turns or when under load. Inspect the CV boots for tears or damage. If the boots are torn, the CV joints are likely contaminated and need to be replaced.
  • Loose Axle Nuts: Loose axle nuts can also cause a clicking noise. Check the axle nuts to ensure they are properly torqued.
  • Worn Wheel Bearings: Worn wheel bearings can also produce clicking or grinding noises. Lift the ATV and check for play in the wheels. If there's excessive play, the wheel bearings need to be replaced.

Battery Blues: Keeping Your 570 Charged and Ready to Go

Battery issues are a common complaint with many ATVs, including the Sportsman 570. Proper battery maintenance is crucial for reliable starting and overall performance.

Tips for Maintaining Your Sportsman 570 Battery:

  • Use a Battery Tender: If you don't ride your ATV regularly, use a battery tender to keep the battery fully charged. This will prevent sulfation, which is a common cause of battery failure.
  • Check the Battery Terminals: Ensure the battery terminals are clean and corrosion-free. Corrosion can impede the flow of electricity and lead to starting problems.
  • Replace the Battery When Necessary: Batteries have a limited lifespan. If your battery is consistently failing to hold a charge, it's time to replace it.

The Cooling System: Preventing Overheating Nightmares

Overheating can cause serious damage to your Sportsman 570 engine. Maintaining the cooling system is essential for preventing this.

Cooling System Maintenance Tips:

  • Check the Coolant Level: Regularly check the coolant level and top it off as needed.
  • Inspect the Radiator: Ensure the radiator is clean and free of debris. A clogged radiator can restrict airflow and cause overheating.
  • Check the Radiator Fan: Make sure the radiator fan is working properly. The fan should turn on when the engine reaches a certain temperature.
  • Flush the Cooling System: Periodically flush the cooling system to remove any buildup of sediment or corrosion.

Suspension Woes: Keeping Your Ride Smooth and Comfortable

The suspension system is crucial for a comfortable and controlled ride. Problems with the suspension can lead to a bumpy ride and reduced handling.

Common Suspension Issues and Solutions:

  • Worn Bushings: Worn bushings can cause excessive play in the suspension and lead to a clunking noise. Inspect the bushings for wear and replace them as needed.
  • Leaking Shocks: Leaking shocks will reduce the damping ability of the suspension, resulting in a bouncy ride. Replace leaking shocks promptly.
  • Broken Springs: Broken springs can cause the ATV to sit unevenly or bottom out easily. Replace broken springs immediately.

Fuel System Foibles: Ensuring Smooth and Consistent Fuel Delivery

A properly functioning fuel system is essential for optimal engine performance. Problems with the fuel system can lead to poor starting, rough running, and reduced power.

Fuel System Maintenance Tips:

  • Use Fresh Fuel: Old or stale fuel can cause problems. Use fresh fuel and add a fuel stabilizer if you're storing the ATV for an extended period.
  • Clean the Fuel Filter: The fuel filter prevents debris from entering the fuel system. Clean or replace the fuel filter regularly.
  • Check the Fuel Lines: Inspect the fuel lines for cracks or leaks. Replace any damaged fuel lines.

Regularly Scheduled Maintenance: The Key to Longevity

Preventive maintenance is the best way to avoid many of the problems discussed above. Following the manufacturer's recommended maintenance schedule will help keep your Sportsman 570 running smoothly for years to come.

Essential Maintenance Tasks:

  • Oil Changes: Change the oil and filter regularly.
  • Air Filter Cleaning: Clean or replace the air filter regularly.
  • Spark Plug Replacement: Replace the spark plug at the recommended interval.
  • Valve Adjustments: Check and adjust the valves as needed.
  • Greasing: Grease all the grease fittings regularly.

Frequently Asked Questions

  • Why does my Sportsman 570 backfire? A backfire can be caused by a lean fuel mixture, a faulty spark plug, or an exhaust leak.
  • What type of oil should I use in my Sportsman 570? Consult your owner's manual for the recommended oil type and viscosity. Polaris recommends their own oil.
  • How often should I change the oil in my Sportsman 570? Refer to your owner's manual for the recommended oil change interval. Typically every 100 hours of riding.
  • Why is my Sportsman 570 overheating? Overheating can be caused by a low coolant level, a clogged radiator, or a faulty radiator fan.
  • How do I troubleshoot electrical problems on my Sportsman 570? A multimeter and a wiring diagram are essential tools for troubleshooting electrical problems.

In conclusion, while the Polaris Sportsman 570 is a reliable ATV, being aware of potential issues and performing regular maintenance will help you avoid costly repairs and enjoy countless hours of off-road fun. Remember to consult your owner's manual and seek professional help when needed.