The Yamaha XT600, a legendary dual-sport motorcycle, has carved a significant niche in the hearts of adventure riders and everyday commuters alike. Renowned for its robust engine, go-anywhere capability, and simple mechanics, it's a bike that evokes a sense of freedom and reliability. However, even a workhorse like the XT600 isn't immune to quirks and potential problems. Knowing these issues beforehand can save you time, money, and frustration, ensuring your XT600 ownership is a rewarding experience.

So, What Can Go Wrong With My XT600?

While the XT600 is generally considered a dependable machine, certain issues tend to crop up more frequently than others, especially in older models. These aren't necessarily deal-breakers, but being aware of them allows you to proactively address them and keep your bike running smoothly.

The Dreaded Starting Issues (Especially When Hot)

This is arguably the most common complaint among XT600 owners, particularly those with the earlier models (pre-1990). The issue often manifests as difficulty starting the bike after it's been running and the engine is hot. There are several potential culprits:

  • Valve Clearances: Incorrect valve clearances are a prime suspect. When the engine heats up, the valve clearances can tighten, leading to poor compression and difficult starting. Regular valve adjustments are crucial.
  • Carburetor Issues: The XT600 uses a dual-carburetor setup, which, while providing good performance, can be a source of problems. Dirty or improperly adjusted carburetors can lead to lean or rich running conditions, making starting difficult. Pay particular attention to the pilot jet.
  • Ignition System: A weak spark can also cause starting problems. Check the spark plug, ignition coil, and stator. A failing stator is a common problem as the bike ages.
  • Fuel System: A clogged fuel filter or a malfunctioning fuel pump can restrict fuel flow, leading to starting difficulties. Make sure the fuel tank vent is clear as well.
  • Automatic Decompressor: The XT600 features an automatic decompressor to make starting easier. If this system is malfunctioning, it can make kick-starting (if your model has it) incredibly difficult.

Oil Leaks: Where is it Coming From?

Oil leaks are another common issue, particularly on older XT600s. The most frequent leak locations include:

  • Valve Cover Gasket: This gasket tends to harden and crack over time, leading to oil seepage. Replacing it is a relatively straightforward task.
  • Base Gasket: The gasket between the cylinder and the engine case can also leak, especially if the engine has been overheated in the past.
  • Countershaft Seal: This seal is located behind the front sprocket and is prone to leaking due to wear and tear.
  • Oil Lines: The oil lines connecting the engine to the oil cooler (if equipped) can become brittle and leak.

Electrical Gremlins: The Usual Suspects

Like many older motorcycles, the XT600 can suffer from electrical problems. These can range from minor annoyances to more serious issues that can leave you stranded.

  • Wiring Harness Issues: The wiring harness can become brittle and corroded over time, leading to intermittent electrical problems. Check for chafed wires and loose connections.
  • Charging System Problems: A failing stator or voltage regulator can prevent the battery from charging properly. This can lead to a dead battery and starting problems.
  • Lighting Issues: Blown bulbs, corroded connectors, and faulty switches can cause lighting problems.
  • Ignition Switch: The ignition switch can wear out over time, leading to intermittent starting problems or a complete loss of power.

Suspension Woes: Time for an Upgrade?

The XT600's suspension is adequate for general use, but it can be a weak point, especially for more aggressive off-road riding or heavier riders.

  • Fork Issues: The forks can become soft and prone to bottoming out. Replacing the fork springs with heavier-duty springs and using thicker fork oil can improve performance.
  • Rear Shock Issues: The rear shock can also become worn out and lose its damping ability. Replacing the shock with an aftermarket unit is a common upgrade.
  • Worn Suspension Bushings: Over time, the bushings in the suspension linkages can wear out, leading to sloppy handling. Replacing these bushings can significantly improve the bike's handling.

Frame Rust: Keeping it Strong

Depending on the climate the bike was subjected to, rust can be a concern, especially on the frame.

  • Common Rust Areas: Check the frame around the footpegs, the swingarm pivot, and the battery box.
  • Prevention: Regularly clean and inspect the frame for rust. Apply rust preventative coatings to protect the metal.

Carburetor Tuning: A Balancing Act

The dual carburetor setup on the XT600 can be finicky, and proper tuning is essential for smooth running and optimal performance.

  • Symptoms of Poor Tuning: Poor idle, hesitation, and poor fuel economy can all be signs of improperly tuned carburetors.
  • Tuning Resources: There are many online resources and guides that can help you tune your XT600's carburetors. A good starting point is to check the float height and adjust the pilot screw.

Clutch Problems: Slipping and Sticking

The clutch on the XT600 is generally reliable, but it can experience problems over time.

  • Clutch Slipping: Slipping can be caused by worn clutch plates or weak clutch springs.
  • Clutch Sticking: Sticking can be caused by dirty clutch plates or a worn clutch cable.

Maintaining Your XT600: Prevention is Key

The best way to avoid problems with your XT600 is to perform regular maintenance. This includes:

  • Regular Oil Changes: Change the oil and filter every 3,000 miles or every year, whichever comes first.
  • Valve Adjustments: Check and adjust the valve clearances every 6,000 miles.
  • Air Filter Cleaning: Clean the air filter regularly, especially if you ride in dusty conditions.
  • Chain Maintenance: Keep the chain clean, lubricated, and properly adjusted.
  • Brake Maintenance: Inspect the brake pads and rotors regularly and replace them as needed.
  • Coolant Flush: Flush the coolant every two years.
  • Carburetor Cleaning: Clean the carburetors periodically to prevent clogging.

Frequently Asked Questions

  • Why is my XT600 hard to start when hot? This is often due to tight valve clearances or carburetor issues. Check and adjust the valve clearances and clean the carburetors.
  • How often should I change the oil on my XT600? You should change the oil and filter every 3,000 miles or every year, whichever comes first.
  • Where is the best place to find parts for my XT600? Many online retailers specialize in XT600 parts, as well as your local motorcycle shop.
  • What is the best oil to use in my XT600? A good quality 20W-50 motorcycle oil is typically recommended.
  • Is the XT600 a good beginner bike? While reliable, the XT600's height and weight can be intimidating for some beginners. Lighter, smaller displacement bikes are often recommended.

Conclusion

The Yamaha XT600, while a fantastic and reliable motorcycle, has its share of potential issues, especially in older models. By understanding these common problems and performing regular maintenance, you can keep your XT600 running smoothly for years to come. Remember to address starting issues promptly and keep an eye out for oil leaks to prevent major repairs down the line.