The Suzuki S40, also known as the LS650 Savage in some markets, is a single-cylinder motorcycle that has carved a niche for itself as a reliable, affordable, and easily customizable machine. Known for its simple design and lightweight feel, it attracts riders looking for a classic, minimalist experience. However, like any motorcycle, the S40 comes with its own set of quirks and potential problems that prospective and current owners should be aware of. This article aims to provide a comprehensive overview of the Suzuki S40, exploring its strengths, weaknesses, and common issues, empowering you to make an informed decision or maintain your ride effectively.

The Allure of Simplicity: Why the S40 Still Turns Heads

The Suzuki S40's appeal lies in its straightforward design. It's a bike that harks back to simpler times, free of excessive electronics and complex systems. This simplicity translates to easier maintenance and a more direct connection to the riding experience. The single-cylinder engine provides ample torque for city riding and relaxed cruising, making it a great option for beginners and experienced riders alike who appreciate a no-frills machine.

The S40's lightweight frame and low seat height also contribute to its user-friendliness. It's easy to handle, especially at low speeds, making it an excellent choice for navigating urban environments and learning the ropes of motorcycling. Furthermore, the S40's relatively low price point makes it an attractive option for those on a budget or looking for a project bike.

What's Great About the S40? More Than Just a Pretty (Simple) Face

Beyond its simplicity, the S40 boasts several advantages that make it a compelling choice:

  • Fuel Efficiency: The single-cylinder engine sips fuel, allowing for impressive mileage, especially on longer rides. You can expect to see figures in the 60-70 mpg range, making it an economical option for commuting or weekend trips.
  • Customization Potential: The S40's minimalist design makes it a blank canvas for customization. From bobbers and choppers to cafe racers and scramblers, the possibilities are endless. The aftermarket support for the S40 is extensive, making it easy to find parts and accessories to personalize your ride.
  • Reliability: The simple engine design translates to fewer potential points of failure. With proper maintenance, the S40 can provide years of reliable service.
  • Ease of Maintenance: Basic maintenance tasks, such as oil changes and chain adjustments, are relatively straightforward on the S40, making it a good choice for riders who enjoy working on their own bikes.
  • Comfortable Riding Position (for some): The relaxed riding position is comfortable for shorter rides. Longer journeys may require modifications to the seat or handlebars depending on your preferences.

The Not-So-Good Bits: S40 Shortcomings to Consider

While the S40 has many positive attributes, it's important to be aware of its limitations:

  • Limited Power: The 650cc single-cylinder engine provides adequate power for city riding and cruising, but it can feel underpowered on the highway, especially when carrying a passenger or luggage. Overtaking requires careful planning.
  • Vibrations: Single-cylinder engines are inherently prone to vibrations. While the S40's engine is counterbalanced, some vibration is still noticeable, particularly at higher speeds. This can lead to fatigue on longer rides.
  • Basic Suspension: The S40's suspension is adequate for smooth roads, but it can feel harsh on bumpy surfaces. Upgrading the suspension can significantly improve ride comfort and handling.
  • Drum Brake (Rear): The rear drum brake is adequate for slowing down, but it lacks the stopping power of a disc brake. This can be a concern in emergency situations.
  • Lack of Modern Features: The S40 lacks modern features such as fuel injection, ABS, and a digital instrument panel. This may be a drawback for riders who are accustomed to more technologically advanced motorcycles.

Common S40 Problems: What To Watch Out For

While generally reliable, the S40 is not without its potential issues. Being aware of these problems can help you prevent them or address them promptly:

  • Cam Chain Tensioner (CCT) Issues: This is perhaps the most common issue with the S40. The automatic cam chain tensioner can fail, leading to excessive cam chain noise and potentially causing damage to the engine. Upgrading to a manual cam chain tensioner is a popular solution. Listen for a rattling sound from the top of the engine, especially at idle.
  • Carburetor Problems: The S40 uses a carburetor, which can be susceptible to clogging and other issues, especially if the bike sits for extended periods. Symptoms include poor starting, rough idling, and hesitation during acceleration. Regular cleaning and maintenance are crucial.
  • Charging System Issues: The S40's charging system can be prone to failure, particularly the stator. Symptoms include a weak battery, difficulty starting, and dimming lights. Testing the charging system components can help diagnose the problem.
  • Neutral Switch Problems: The neutral switch can fail, making it difficult to find neutral. This can be frustrating, especially in traffic. Replacing the switch is usually a simple fix.
  • Clutch Problems: The clutch can wear out over time, leading to slipping and difficulty shifting. Replacing the clutch plates is a common maintenance task.
  • Stator Issues: As mentioned above, the stator can be a weak point. Symptoms include a failing battery, inability to hold a charge, and the bike dying while running. Regular voltage checks are recommended.
  • Exhaust Leaks: The exhaust gaskets can deteriorate over time, leading to exhaust leaks. This can affect performance and fuel economy. Replacing the gaskets is a relatively simple repair.
  • Rust: Depending on the climate and maintenance, rust can be an issue, particularly on the frame, exhaust, and chrome parts. Regular cleaning and rust prevention measures are essential.

Keeping Your S40 Happy: Maintenance Tips and Tricks

Regular maintenance is key to keeping your S40 running smoothly and reliably:

  • Regular Oil Changes: Change the oil and filter every 3,000 miles or as recommended in the owner's manual.
  • Chain Maintenance: Keep the chain clean, lubricated, and properly adjusted.
  • Carburetor Cleaning: Clean the carburetor regularly, especially if the bike sits for extended periods.
  • Battery Maintenance: Keep the battery charged and terminals clean.
  • Check Tire Pressure: Maintain proper tire pressure for optimal handling and fuel economy.
  • Inspect Brakes: Regularly inspect the brake pads and shoes for wear.
  • Check Cables and Hoses: Inspect cables and hoses for cracks, leaks, and fraying.
  • Grease Bearings: Regularly grease the wheel bearings, steering head bearings, and swingarm bearings.
  • Monitor the CCT: Listen for any unusual noises from the cam chain tensioner and consider upgrading to a manual unit.

S40 Modifications: Taking Your Ride to the Next Level

The S40's simple design lends itself well to modifications. Here are some popular upgrades:

  • Manual Cam Chain Tensioner: Replacing the automatic tensioner with a manual unit is a common and highly recommended upgrade.
  • Suspension Upgrades: Upgrading the front fork springs and rear shocks can significantly improve ride comfort and handling.
  • Carburetor Jetting: Re-jetting the carburetor can improve performance, especially after installing aftermarket exhaust systems.
  • Exhaust Systems: Aftermarket exhaust systems can improve performance and sound.
  • Seat Upgrades: Upgrading the seat can improve comfort on longer rides.
  • Handlebar Upgrades: Changing the handlebars can alter the riding position and improve comfort.
  • Cosmetic Modifications: The possibilities are endless when it comes to cosmetic modifications. From bobber kits to custom paint jobs, you can personalize your S40 to your heart's content.

Frequently Asked Questions

  • Is the Suzuki S40 a good beginner bike? Yes, the S40's lightweight, low seat height, and manageable power make it a great choice for beginners.
  • How reliable is the Suzuki S40? The S40 is generally considered a reliable bike, especially with regular maintenance. The cam chain tensioner is a known weak point that should be addressed.
  • What is the fuel economy of the Suzuki S40? The S40 typically gets between 60 and 70 mpg.
  • What is the top speed of the Suzuki S40? The top speed is around 80-85 mph, but it's not particularly comfortable at those speeds.
  • How often should I change the oil on my Suzuki S40? Change the oil and filter every 3,000 miles or as recommended in the owner's manual.
  • What is the best upgrade for the Suzuki S40? Upgrading the cam chain tensioner to a manual unit is considered the best and most important upgrade. This prevents potential engine damage.

Final Thoughts: A Simple Bike with Enduring Appeal

The Suzuki S40 is a motorcycle that rewards simplicity and offers a unique riding experience. While it has its limitations and potential problems, its reliability, affordability, and customization potential make it a compelling choice for a wide range of riders. If you're looking for a classic, no-frills motorcycle that's easy to maintain and personalize, the S40 is definitely worth considering. Remember to be aware of the potential issues and perform regular maintenance to keep your S40 running smoothly for years to come.