The Honda Rincon 680, a stalwart of the ATV world, is renowned for its reliability and robust performance. However, even the most dependable machines can experience hiccups. Understanding the common issues that Rincon 680 owners face can empower you to diagnose problems quickly, perform necessary maintenance, and keep your ATV running smoothly for years to come. Let's dive into the potential problems and how to address them.

My Rincon's Shifting is Acting Strange! What's Up?

One of the most frequently reported issues with the Rincon 680 revolves around its automatic transmission. This isn't necessarily a sign of catastrophic failure, but rather a call for attention to specific components.

  • Delayed or Erratic Shifting: If your Rincon is hesitant to shift gears, shifts abruptly, or seems to get "stuck" in a gear, several factors could be at play.

    • Low Transmission Fluid: This is the first and easiest thing to check. Low fluid can cause all sorts of shifting problems. Use the recommended Honda ATV transmission fluid and ensure it's filled to the correct level.
    • Dirty Transmission Fluid: Over time, transmission fluid degrades and becomes contaminated with debris. This can clog valves and impede smooth operation. A transmission fluid flush and filter replacement can often resolve the issue.
    • Faulty Shift Solenoid: The shift solenoids are responsible for actuating the gears within the transmission. If one or more of these solenoids fail, it can lead to shifting problems. Testing the solenoids with a multimeter can help identify a faulty unit.
    • Sticking Angle Sensor: The angle sensor provides the ECU (Engine Control Unit) with information about the ATV's lean angle. This data is used to optimize shifting performance. If the angle sensor is sticking or malfunctioning, it can send incorrect signals to the ECU, resulting in erratic shifting.
    • ECU Problems: In rare cases, the ECU itself can be the culprit. This is usually a last resort diagnosis after ruling out other possibilities.

  • Transmission Slippage: Slippage occurs when the transmission fails to properly engage a gear, causing a loss of power. This can feel like the engine is revving but the ATV isn't accelerating proportionally.

    • Worn Clutch Plates: Over time, the clutch plates within the transmission can wear down, reducing their ability to grip. This is a common cause of slippage, especially in ATVs that are frequently used for heavy towing or aggressive riding.
    • Damaged One-Way Bearing: The one-way bearing allows the transmission to freewheel in one direction. If this bearing is damaged, it can cause slippage during deceleration.
    • Internal Transmission Damage: More serious internal damage, such as broken gears or damaged shafts, can also lead to slippage. This usually requires a complete transmission rebuild.

Pro Tip: Regularly inspect and maintain your Rincon 680's transmission fluid. This simple preventative measure can significantly extend the life of your transmission and prevent many of these shifting issues.

My Rincon Won't Start! Help!

A no-start condition can be frustrating, but it's often due to a simple issue that can be easily resolved. Here are some common culprits:

  • Dead Battery: This is the most common cause of a no-start. Check the battery voltage with a multimeter. A fully charged battery should read around 12.6 volts. If it's significantly lower, try charging the battery. If it doesn't hold a charge, it needs to be replaced.

  • Loose or Corroded Battery Connections: Even a fully charged battery won't work if the connections are loose or corroded. Clean the battery terminals with a wire brush and make sure the connections are tight.

  • Faulty Starter Solenoid: The starter solenoid is a relay that sends power to the starter motor. If the solenoid fails, the starter won't engage. You can test the solenoid by jumping the two large terminals with a screwdriver. If the starter cranks, the solenoid is likely bad.

  • Bad Starter Motor: The starter motor itself can fail. If you hear a clicking sound when you try to start the ATV, but the engine doesn't crank, the starter motor may be the problem.

  • Fuel Issues:

    • Empty Fuel Tank: Sounds obvious, but it happens!
    • Clogged Fuel Filter: A clogged fuel filter can restrict fuel flow to the engine. Replace the fuel filter regularly.
    • Stale Fuel: Fuel can degrade over time, especially if the ATV has been sitting for a while. Drain the old fuel and replace it with fresh fuel.
    • Faulty Fuel Pump: The fuel pump is responsible for delivering fuel to the engine. If the fuel pump fails, the engine won't receive fuel.
    • Clogged Fuel Injector: A clogged fuel injector can prevent fuel from being sprayed into the engine.

  • Ignition Problems:

    • Faulty Spark Plug: A fouled or worn spark plug can prevent the engine from starting. Replace the spark plug regularly.
    • Faulty Ignition Coil: The ignition coil provides the high voltage needed to create a spark at the spark plug. If the coil fails, the engine won't start.
    • Faulty Crankshaft Position Sensor: The crankshaft position sensor tells the ECU the position of the crankshaft. If the sensor fails, the ECU won't know when to fire the spark plug.

  • Kill Switch Engaged: Make sure the kill switch is in the "run" position. This is an easy one to overlook.

Pro Tip: Use a fuel stabilizer when storing your Rincon 680 for extended periods. This will help prevent the fuel from degrading and causing starting problems.

My Rincon is Overheating! What Should I Do?

Overheating can cause serious damage to your engine, so it's important to address it quickly. Here are some common causes:

  • Low Coolant Level: This is the most common cause of overheating. Check the coolant level in the radiator and the overflow tank. Add coolant as needed. Use the recommended Honda ATV coolant.
  • Leaking Coolant System: Check for leaks in the radiator, hoses, and water pump. Repair any leaks immediately.
  • Clogged Radiator: Mud, debris, and insects can clog the radiator fins, reducing its ability to dissipate heat. Clean the radiator fins with a soft brush and water.
  • Faulty Thermostat: The thermostat regulates the flow of coolant through the engine. If the thermostat is stuck closed, it can prevent coolant from circulating properly, leading to overheating.
  • Faulty Water Pump: The water pump circulates coolant through the engine. If the water pump fails, the engine won't be cooled properly.
  • Air in the Cooling System: Air pockets in the cooling system can prevent coolant from circulating properly. Bleed the air from the cooling system by opening the bleed valve on the thermostat housing.
  • Running Too Lean: A lean fuel mixture (too much air, not enough fuel) can cause the engine to run hot. This can be caused by a clogged fuel injector, a vacuum leak, or a faulty oxygen sensor.

Pro Tip: Regularly inspect your Rincon 680's cooling system for leaks and damage. This can help prevent overheating and costly repairs.

My Rincon's Brakes Feel Spongy!

Spongy brakes indicate air in the brake lines or a problem with the master cylinder.

  • Air in the Brake Lines: Air in the brake lines compresses, reducing braking power. Bleed the brakes to remove the air.
  • Worn Brake Pads: Worn brake pads reduce braking effectiveness and can contribute to a spongy feel. Replace the brake pads when they are worn.
  • Leaking Brake Calipers: Leaks in the brake calipers can allow air to enter the system and reduce braking power. Repair any leaks immediately.
  • Faulty Master Cylinder: The master cylinder is responsible for pressurizing the brake fluid. If the master cylinder fails, the brakes will feel spongy.

Pro Tip: Use the correct type of brake fluid for your Rincon 680. Using the wrong type of fluid can damage the brake system.

Other Common Rincon 680 Issues

  • Rear Differential Problems: Rincon 680s can sometimes experience issues with the rear differential, including noise, leaks, and binding. Regular fluid changes are crucial.
  • CV Joint Problems: The CV joints are responsible for transmitting power from the transmission to the wheels. If the CV joints are damaged, they can cause clicking or popping noises, especially when turning.
  • Electrical Problems: Loose connections, corroded wires, and faulty sensors can cause a variety of electrical problems. Inspect the wiring harness regularly and repair any damage.

Frequently Asked Questions

Q: Why is my Rincon 680 shifting hard?

A: Hard shifting can be caused by low or dirty transmission fluid, a faulty shift solenoid, or a sticking angle sensor. Check the fluid level and condition first, then investigate the solenoids and sensor.

Q: My Rincon 680 keeps overheating. What's the likely cause?

A: The most common cause is low coolant. Check the coolant level and look for leaks. Also, ensure the radiator fins are clean and the thermostat is functioning correctly.

Q: How often should I change the transmission fluid on my Rincon 680?

A: Honda recommends changing the transmission fluid every 1,000 miles or annually, whichever comes first. However, more frequent changes may be necessary if you frequently ride in muddy or dusty conditions.

Q: My Rincon 680 won't start, and I hear a clicking sound. What could it be?

A: The clicking sound usually indicates a weak battery or a faulty starter solenoid. Try charging the battery first, and if that doesn't work, test the starter solenoid.

Q: What type of oil should I use in my Rincon 680's engine?

A: Honda recommends using a 10W-40 engine oil specifically designed for ATVs. Always refer to your owner's manual for the specific oil requirements for your model.

Conclusion

While the Honda Rincon 680 is a dependable ATV, understanding its common issues and performing regular maintenance are key to ensuring its longevity and performance. By addressing these potential problems proactively, you can keep your Rincon running smoothly for years to come and enjoy countless hours of off-road adventures.