The Kawasaki Z650RS, a retro-styled motorcycle that beautifully blends classic aesthetics with modern performance, has captured the hearts of many riders. Its comfortable ergonomics, punchy parallel-twin engine, and undeniably cool looks make it a compelling choice in the middleweight motorcycle market. However, like any machine, the Z650RS isn't without its potential quirks and issues. While the vast majority of owners report positive experiences, understanding the common problems that can arise is crucial for making an informed purchase and proactively addressing any concerns that may surface during ownership.

The Elephant in the Room: Suspension Woes

One of the most frequently cited criticisms of the Z650RS revolves around its suspension. While perfectly adequate for smooth roads and casual riding, the stock suspension can feel underdamped and overly soft, especially when pushed harder on twisty roads or when carrying a passenger. This can manifest as:

  • Excessive dive under braking: The front forks can compress significantly under hard braking, unsettling the chassis and reducing rider confidence.
  • Wallowing in corners: The rear shock can struggle to control the bike's movement in corners, leading to a feeling of instability and vagueness.
  • Rough ride over bumps: The suspension can transmit bumps and imperfections in the road directly to the rider, making for an uncomfortable experience on less-than-perfect surfaces.

This issue isn't necessarily a "problem" in the sense of a mechanical failure, but rather a limitation of the stock components. Kawasaki likely opted for a more budget-friendly suspension setup to keep the bike's price competitive. The good news is that this is a relatively easy problem to address with aftermarket upgrades. Options range from simply replacing the fork springs and shock oil with higher-quality alternatives to installing a fully adjustable aftermarket shock and fork cartridges.

How to fix it: Consider upgrading the fork springs and oil, or investing in a full aftermarket suspension setup for improved handling and comfort. Research different brands and options to find the best fit for your riding style and budget.

Heat Management: A Warm Topic

Another common complaint, particularly among riders in warmer climates, is the amount of heat generated by the Z650RS's engine. While all internal combustion engines produce heat, some riders find the heat radiating from the Z650RS's engine and exhaust system to be excessive, especially during slow-speed riding or in stop-and-go traffic.

This isn't necessarily a design flaw, but rather a characteristic of the engine configuration and exhaust system routing. The parallel-twin engine is compact and efficient, but it also generates a significant amount of heat in a relatively small area. The exhaust system, particularly the catalytic converter, further contributes to the heat output.

What can you do?

  • Consider aftermarket exhaust options: Some aftermarket exhaust systems are designed to run cooler than the stock system. However, be aware that changing the exhaust can affect the bike's performance and may require a fuel remapping.
  • Wear appropriate riding gear: Wearing full riding gear, including pants and boots, can help to insulate you from the engine heat.
  • Avoid prolonged idling: Minimize idling in hot weather to reduce heat buildup.
  • Check coolant levels: Ensure that the coolant level in the radiator is within the specified range.

Fueling Quirks: A Slight Hiccup

Some Z650RS owners have reported minor fueling issues, such as a slightly abrupt throttle response at low speeds or occasional stalling at idle. These issues are often attributed to the bike's lean fuel mapping, which is designed to meet emissions regulations.

While these fueling quirks are generally minor and don't significantly impact the bike's overall performance, they can be annoying.

Possible solutions:

  • ECU Remapping: A custom ECU remap can smooth out the throttle response and improve overall fueling accuracy. This can be done by a qualified tuner using a dynamometer.
  • Fuel Controller: A fuel controller, such as a Power Commander or Dynojet, allows you to adjust the fuel mixture without remapping the ECU.
  • Throttle Cable Adjustment: Ensure the throttle cable has the correct amount of slack. Too much or too little slack can cause jerky throttle response.

Indicator Switch Sensitivity: A Minor Annoyance

A few owners have noted that the indicator (turn signal) switch can be overly sensitive, making it easy to accidentally activate the indicators. This is a minor issue, but it can be annoying, especially when wearing thick gloves.

The simple fix: Unfortunately, there's no easy fix for this. Getting used to the switch's sensitivity is the best solution. You can also try adjusting the position of the switch on the handlebar to make it easier to reach and operate.

Paint Quality: A Cosmetic Concern

While the Z650RS is a visually stunning motorcycle, some owners have expressed concerns about the paint quality, particularly its susceptibility to scratches and chips. This is especially true for the painted fuel tank.

Protecting the paint:

  • Use a tank pad: A tank pad can protect the fuel tank from scratches caused by your belt buckle or riding gear.
  • Apply paint protection film (PPF): PPF is a clear, self-healing film that can protect the paint from scratches, chips, and other damage.
  • Be careful when washing and waxing: Use a soft microfiber cloth and gentle cleaning products to avoid scratching the paint.

Clutch Lever Play: Keeping it Adjusted

Like many cable-actuated clutches, the Z650RS's clutch lever can require periodic adjustment to maintain proper free play. If the clutch lever has too much free play, the clutch may not fully disengage, leading to difficulty shifting gears. If the clutch lever has too little free play, the clutch may slip, causing premature wear.

Regular maintenance is key: Check the clutch lever free play regularly and adjust it as needed according to the owner's manual. This is a simple task that can be performed at home with basic tools.

Potential for Corrosion: Especially in Harsh Environments

Like any motorcycle, the Z650RS is susceptible to corrosion, especially in areas with harsh weather conditions or where salt is used on the roads. Corrosion can affect various parts of the bike, including the frame, engine components, and electrical connections.

Preventing corrosion:

  • Wash the bike regularly: Wash the bike regularly with soap and water, especially after riding in wet or salty conditions.
  • Apply a corrosion inhibitor: Apply a corrosion inhibitor to exposed metal surfaces to protect them from rust.
  • Store the bike in a dry place: Store the bike in a dry place when not in use.
  • Consider ceramic coating: A ceramic coating can provide an extra layer of protection against corrosion and other environmental damage.

Electrical Gremlins: Rare But Possible

While generally reliable, some Z650RS owners have reported occasional electrical issues, such as problems with the instrument panel, lights, or starting system. These issues are typically rare and often caused by loose connections or faulty sensors.

Troubleshooting electrical problems:

  • Check the battery: Ensure that the battery is fully charged and in good condition.
  • Check the fuses: Check the fuses for any blown fuses.
  • Check the connections: Inspect all electrical connections for looseness or corrosion.
  • Consult a qualified mechanic: If you're unable to diagnose the problem yourself, consult a qualified motorcycle mechanic.

Aftermarket Accessories: Finding the Right Fit

The Z650RS has a thriving aftermarket scene, with a wide variety of accessories available to customize and improve the bike. However, it's important to choose aftermarket accessories carefully to ensure that they are compatible with the bike and of good quality.

Research before you buy:

  • Read reviews: Read reviews from other Z650RS owners before purchasing aftermarket accessories.
  • Choose reputable brands: Stick to reputable brands that are known for producing high-quality products.
  • Ensure compatibility: Make sure that the accessories are compatible with your specific model year and configuration.
  • Consider professional installation: If you're not comfortable installing the accessories yourself, have them installed by a qualified mechanic.

Final Thoughts on Z650RS "Problems"

It's important to remember that the vast majority of Z650RS owners are very happy with their bikes. The "problems" discussed above are relatively minor and often easily addressed. The Z650RS is a well-built and reliable motorcycle that offers a fantastic riding experience. By being aware of these potential issues, you can be proactive in addressing them and ensuring that your Z650RS provides years of trouble-free enjoyment.

Frequently Asked Questions

  • Is the Z650RS reliable? Yes, the Z650RS is generally considered a reliable motorcycle with a proven engine and robust components. Most owners report minimal issues.

  • Is the suspension really that bad? The stock suspension is adequate for casual riding, but it can feel underdamped when pushed harder. Many riders choose to upgrade it for improved handling and comfort.

  • Does the Z650RS get hot? The Z650RS can generate a noticeable amount of heat, especially in hot weather or slow traffic. Wearing appropriate gear and avoiding prolonged idling can help mitigate this.

  • Is the Z650RS a good beginner bike? Yes, the Z650RS is often recommended as a good beginner bike due to its manageable power, comfortable ergonomics, and forgiving handling. However, new riders should always receive proper training and start cautiously.

  • Are parts readily available for the Z650RS? Yes, parts for the Z650RS are readily available through Kawasaki dealers and aftermarket suppliers. The bike shares many components with other popular Kawasaki models, making parts procurement relatively easy.

In conclusion, while the Kawasaki Z650RS may have a few minor areas for improvement, such as the suspension and heat management, these are generally outweighed by its positive attributes. Addressing these potential issues proactively can ensure a long and enjoyable ownership experience.