The Suzuki FA50, affectionately known as the "Suzy," is a classic moped that has brought joy to generations. But like any vintage machine, it can develop quirks, and one of the most common frustrations for FA50 owners is a temperamental kickstart. A kickstart that refuses to engage, slips, or feels unusually stiff can quickly turn a fun ride into a frustrating ordeal. Let’s dive into the common culprits behind these kickstart woes and how to troubleshoot them.

Why Won't My Suzy Start? Decoding the Kickstart Conundrum

Before we get into the nitty-gritty, it's important to understand the basics of how the FA50 kickstart mechanism works. When you push down on the kickstart lever, it engages a series of gears that ultimately rotate the crankshaft. This rotation draws fuel and air into the cylinder, compresses it, and (hopefully) ignites it, starting the engine. Any disruption in this sequence – a slipping gear, a lack of compression, or an ignition problem – can prevent your Suzy from firing up.

Here's a breakdown of the common issues you might encounter:

  • Slipping Kickstart: This is when the kickstart lever moves freely, but the engine doesn't turn over. It feels like the gears aren't catching.
  • Stuck Kickstart: The lever might be difficult or impossible to move.
  • Hard to Kick: The lever moves but requires excessive force to turn the engine over.
  • Kickstart Engages But No Start: The engine turns over, but doesn't fire up. (This often points to ignition or fuel delivery issues, not directly the kickstart mechanism itself, but we'll touch on it.)

The Usual Suspects: Common Causes of FA50 Kickstart Issues

Now, let's investigate the most common reasons for these kickstart problems. We'll cover the potential culprits, from the relatively simple to the more complex.

1. Worn or Damaged Kickstart Gears:

This is probably the most frequent offender, especially in older FA50s. Over time, the teeth on the kickstart gears can wear down or even break. This prevents them from properly engaging with the other gears that turn the crankshaft.

  • Symptoms: Slipping kickstart, grinding noises when kicking, or a kickstart lever that feels "loose."
  • Diagnosis: This requires removing the right-side engine cover to inspect the kickstart gears visually. Look for rounded, chipped, or missing teeth. Compare them to pictures of new gears if you're unsure.
  • Solution: Replacing the worn or damaged gears is the only permanent fix. Consider replacing the entire kickstart assembly if multiple gears show wear.

2. Kickstart Spring Issues:

The kickstart spring is responsible for returning the kickstart lever to its resting position after you've kicked it. A broken or weakened spring can cause several problems.

  • Symptoms: Kickstart lever doesn't return fully, kickstart lever feels "floppy," or kickstart lever gets stuck in the down position.
  • Diagnosis: Again, removing the right-side engine cover is necessary. Inspect the spring for breaks, kinks, or signs of fatigue.
  • Solution: Replacing the kickstart spring is a relatively simple and inexpensive repair. Ensure you install it correctly, following the service manual.

3. Clutch Issues (Especially the Centrifugal Clutch):

While not directly part of the kickstart mechanism, the centrifugal clutch plays a crucial role in transferring power from the engine to the rear wheel. If the clutch is worn, slipping, or sticking, it can make starting the FA50 more difficult and can even mimic kickstart problems.

  • Symptoms: Kickstart engages, but the engine turns over weakly, the engine revs high without much acceleration, or the bike stalls easily.
  • Diagnosis: This is a more involved process that often requires specialized tools and knowledge. Inspect the clutch shoes for wear, the clutch springs for fatigue, and the clutch bell for scoring.
  • Solution: Depending on the severity of the wear, you might need to replace the clutch shoes, springs, or the entire clutch assembly.

4. Low Compression:

Low compression means that the engine isn't sealing properly, making it difficult to draw in fuel and air and compress them for ignition. This can make the engine very hard to start, even with a perfectly functioning kickstart.

  • Symptoms: Hard to kick, engine turns over very easily (almost too easily), weak or no power, and difficulty starting.
  • Diagnosis: A compression test using a compression gauge is the most accurate way to diagnose low compression. Common causes include worn piston rings, a damaged cylinder, or leaky valves.
  • Solution: This can range from replacing the piston rings to a complete engine rebuild, depending on the severity of the damage.

5. Carburetor Problems:

A dirty or improperly adjusted carburetor can prevent the engine from receiving the correct fuel-air mixture, making it difficult to start.

  • Symptoms: Hard to start, engine runs poorly, stalls easily, and black smoke from the exhaust.
  • Diagnosis: Inspect the carburetor for dirt, debris, and proper adjustment. Check the float level and jets.
  • Solution: Cleaning and adjusting the carburetor is often the first step. If the carburetor is severely damaged, it may need to be rebuilt or replaced.

6. Ignition Problems:

A weak or intermittent spark can also make the FA50 difficult to start.

  • Symptoms: Engine turns over but doesn't fire, weak spark, and intermittent starting problems.
  • Diagnosis: Check the spark plug for wear and proper gap. Test the ignition coil and CDI unit.
  • Solution: Replace the spark plug, ignition coil, or CDI unit as needed.

7. Binding or Seized Engine Components:

In rare cases, a seized piston or other binding engine components can make the kickstart extremely difficult or impossible to move.

  • Symptoms: Kickstart lever is completely locked up, engine won't turn over at all, and grinding noises.
  • Diagnosis: This is a serious issue that requires a thorough engine inspection.
  • Solution: This usually involves a complete engine rebuild.

8. Incorrect Assembly:

If you've recently worked on the engine or kickstart mechanism, double-check that everything is assembled correctly. A misaligned gear or a missing washer can cause significant problems. Refer to the FA50 service manual for detailed assembly instructions.

Getting Your Hands Dirty: Troubleshooting Your FA50 Kickstart

Okay, so you have a better idea of what might be wrong. Let’s get into some practical troubleshooting steps.

Step 1: Visual Inspection:

Start with a thorough visual inspection. Look for any obvious signs of damage, wear, or loose connections. Check the kickstart lever for any signs of bending or damage.

Step 2: Check the Kickstart Lever Movement:

How does the kickstart lever feel? Is it smooth and easy to move, or is it stiff and resistant? Does it return to its resting position properly?

Step 3: Listen Carefully:

Pay attention to any unusual noises when you kick the engine. Grinding, clicking, or slipping sounds can provide valuable clues.

Step 4: Basic Maintenance:

Before diving into major repairs, make sure the basics are covered. Ensure the spark plug is clean and properly gapped, the carburetor is clean, and the fuel is fresh.

Step 5: Compression Test (If Possible):

If you have access to a compression gauge, perform a compression test. This will give you a good indication of the engine's overall health.

Step 6: Accessing the Kickstart Mechanism:

If the visual inspection doesn't reveal any obvious problems, you'll need to remove the right-side engine cover to access the kickstart mechanism.

Important Note: Before removing any engine components, consult the FA50 service manual. This will provide detailed instructions and torque specifications.

Step 7: Inspecting the Kickstart Gears and Spring:

Once you have access to the kickstart mechanism, carefully inspect the gears for wear, damage, or missing teeth. Also, inspect the kickstart spring for breaks or kinks.

Step 8: Testing the Kickstart Mechanism:

With the engine cover removed, try manually engaging the kickstart mechanism. This will help you identify any binding or slipping issues.

Tools You'll Need

Having the right tools will make the troubleshooting and repair process much easier. Here's a list of essential tools:

  • Socket Set: Metric sockets are essential for removing engine covers and other components.
  • Wrench Set: A set of metric wrenches will also come in handy.
  • Screwdrivers: Both Phillips and flathead screwdrivers are needed.
  • Pliers: For removing springs and other small parts.
  • Torque Wrench: For tightening bolts to the correct specifications.
  • Compression Gauge: For testing engine compression.
  • Multimeter: For testing electrical components.
  • Service Manual: The FA50 service manual is an invaluable resource.
  • Penetrating Oil: For loosening rusted bolts.
  • Grease: For lubricating moving parts.

Frequently Asked Questions (FAQs)

  • Q: My kickstart slips. What's most likely the problem? A: Worn kickstart gears are the most common cause of a slipping kickstart. You'll need to inspect the gears for damage and replace them if necessary.

  • Q: My kickstart is stuck. What should I do? A: Try applying penetrating oil to the kickstart mechanism and gently rocking the lever back and forth. If that doesn't work, you may need to disassemble the kickstart mechanism to identify the cause of the binding.

  • Q: How do I check the compression on my FA50? A: Remove the spark plug, screw in a compression gauge, and kick the engine over several times. The gauge will display the engine's compression pressure. Consult the service manual for the correct compression specifications.

  • Q: My FA50 turns over with the kickstart but won't start. Is it the kickstart's fault? A: Not necessarily. If the engine is turning over, the kickstart mechanism is likely functioning. The problem is likely with the fuel or ignition system. Check the spark plug, carburetor, and fuel lines.

  • Q: Where can I find replacement parts for my FA50? A: Online retailers specializing in vintage motorcycle parts are a good source. Also, check with local motorcycle shops and online forums dedicated to the Suzuki FA50.

Conclusion

Dealing with a faulty kickstart on your Suzuki FA50 can be frustrating, but with a systematic approach and a little patience, you can usually diagnose and fix the problem yourself. Remember to consult the service manual and take your time to ensure you're doing everything correctly; a well-maintained Suzy is a reliable and fun machine for years to come.