2009 Honda Metropolitan Fuel Pump: The Complete Owner’s Guide to Buying, Replacing, and Keeping Your Scooter on the Road

The bottom line up front: If you own a 2009 Honda Metropolitan (CHF50), your fuel pump is an electromagnetic unit mounted inside the fuel tank, and when it fails, your scooter will sputter, stall, or refuse to start. The good news is that replacing it is straightforward, and you can choose between a genuine Honda part (16710-GET-013) or a high-quality aftermarket replacement that often costs less and performs just as well—if not better.

This guide walks you through everything you need to know about the 2009 Honda Metropolitan fuel pump: how it works, what goes wrong, how to test it, how to replace it, and where to buy the best replacement for your money. Whether you are a first-time scooter owner or a seasoned DIY mechanic, this article is written in plain English and designed to save you time, money, and frustration.

What Kind of Fuel Pump Does a 2009 Honda Metropolitan Use?

The 2009 Honda Metropolitan is powered by a lightweight 49cc four-stroke OHC liquid-cooled single-cylinder engine . This engine uses an electromagnetic fuel pump located inside the fuel tank, mounted under the floor of the scooter . Unlike older carbureted scooters that rely on vacuum-operated mechanical pumps, the Metropolitan’s pump uses a solid-state ECU to control ignition timing, the alternator regulator, and the electric fuel pump .

This design has a few important benefits. Because the pump is electric, it delivers fuel consistently regardless of engine vacuum. It also sits inside the tank, which helps keep it cool and reduces the risk of vapor lock. And because the pump is small and efficient, it leaves more room under the seat for storage—the Metropolitan offers nearly 22 liters of underseat capacity .

Key specifications of the OEM fuel pump:

  • OE part number: 16710-GET-013 (also listed as 16710-GET-003 in some references)
  • Voltage: 12V
  • Pump flow: 40–50 ml per minute
  • Inlet connection: 1/4-inch hose barb
  • Outlet connection: 3/16-inch hose barb

These specifications matter because they tell you exactly what to look for when buying a replacement. If a pump does not match these numbers, it may not deliver the right fuel pressure or flow rate for your engine.

Why the Fuel Pump Fails: Common Symptoms and Causes

A failing fuel pump rarely gives you zero warning. Most of the time, your scooter will start showing symptoms long before the pump completely quits. Here are the most common signs that your 2009 Honda Metropolitan fuel pump needs attention:

1. Hard starting or no-start condition. If you turn the key and the engine cranks but won’t fire, the fuel pump may not be delivering fuel to the carburetor. This is the most common failure symptom .

2. Sputtering or hesitation during acceleration. When the pump cannot maintain consistent pressure, the engine will feel like it is "starving" for fuel. You might notice a lack of power when climbing hills or accelerating from a stop .

3. Poor fuel economy. A pump that is working but not delivering the correct pressure can cause the engine to run rich or lean, both of which hurt gas mileage .

4. Engine stalling at idle or while riding. If the pump dies completely, the engine will shut off. This can happen suddenly and without warning, especially after the scooter has been running for a while and the pump has had time to heat up.

5. Whining or buzzing noise from the fuel tank area. A healthy fuel pump makes a soft hum when you turn the key. If you hear a loud whine, the pump bearings or internal components may be wearing out .

The most common causes of fuel pump failure on the Metropolitan include:

  • Age and mileage. The 2009 model is now over 15 years old. Rubber seals, diaphragms, and internal plastic components degrade over time .
  • Contaminated fuel. Dirt, water, or rust in the tank can clog the pump’s inlet filter and cause premature wear .
  • Running the tank too low. The pump uses fuel as a coolant. If you frequently run the tank near empty, the pump can overheat and fail .
  • Ethanol-blended gasoline. Modern fuel blends containing ethanol can be harder on older pump components .

How to Test the Fuel Pump on a 2009 Honda Metropolitan

Before you spend money on a new pump, it is worth taking 15 minutes to confirm that the pump is actually the problem. Here is a simple step-by-step testing procedure that anyone can do at home:

Step 1: Check the fuse. Locate the fuse box and inspect the fuse that protects the fuel pump circuit. A blown fuse is a common cause of a dead pump and costs less than a dollar to replace.

Step 2: Turn the key to the "ON" position. You should hear a faint humming or buzzing sound coming from the fuel tank area for about 2–3 seconds. This is the pump pressurizing the system. If you hear nothing, the pump may not be receiving power.

Step 3: Test for power at the pump connector. Using a multimeter, check the wiring harness connector that plugs into the fuel pump. You should see 12V DC when the key is in the "ON" position. If there is no voltage, the problem is in the wiring, the ECU, or a relay—not the pump itself.

Step 4: Check fuel flow. Disconnect the fuel line from the carburetor and place it in a clean container. Turn the key on and see if fuel flows out. A healthy pump should deliver a steady stream with no air bubbles. If fuel barely drips or does not flow at all, the pump is likely faulty .

Step 5: Listen for abnormal noise. A pump that is struggling internally often makes a much louder, higher-pitched whine than usual. If the sound changes noticeably, replacement is recommended.

One important note: the Metropolitan uses a key-operated ignition lock that also has an integrated trunk-release switch. By pushing in the key, you can unlock the underseat compartment . This makes accessing the pump easier on some models, though you will still need to remove the floor panel to reach the tank-mounted pump on the CHF50.

How to Replace the Fuel Pump: A Step-by-Step Guide

Replacing the fuel pump on a 2009 Honda Metropolitan is a moderate DIY job. Most owners with basic mechanical skills can complete it in about an hour or two. Here is the general procedure:

1. Gather your tools and parts. You will need a socket set, Phillips and flathead screwdrivers, pliers, a clean rag, and a new fuel pump assembly. If you are using an aftermarket kit, it may also include a fuel filter, hose clamps, and a replacement fuel hose .

2. Disconnect the battery. Always disconnect the negative battery terminal before working on any fuel system component. This prevents accidental sparks and electrical shorts .

3. Drain the fuel tank. Use a siphon hose to remove as much fuel as possible from the tank. This makes the pump lighter and easier to handle, and it reduces the risk of spilling gasoline.

4. Remove the floor panels. The Metropolitan has a two-piece, die-cast-aluminum chassis . You will need to remove the floor tunnel cover and the center floor panels to access the fuel tank. Set the screws aside in a safe place.

5. Disconnect the fuel lines and electrical connector. Carefully unplug the wiring harness from the top of the pump. Then, loosen the hose clamps on the fuel lines and pull them off. Have a rag ready, because some fuel will remain in the lines.

6. Remove the pump from the tank. The pump assembly is typically held in place by a retaining ring or a bracket. Turn it counterclockwise or remove the bolts, then lift the pump straight up and out of the tank.

7. Install the new pump. Lower the new pump into the tank, making sure the rubber gasket seats properly. Secure it with the retaining ring or bracket, then reconnect the fuel lines and the electrical connector.

8. Reinstall the floor panels and reconnect the battery. Once everything is back together, turn the key to the "ON" position and check for leaks. You should hear the pump prime for a few seconds. If you see any fuel dripping, tighten the connections before starting the engine.

9. Take a test ride. Start the scooter and let it idle for a few minutes. Check that the engine runs smoothly, accelerates without hesitation, and does not leak fuel .

If you are not comfortable doing this yourself, any certified Honda technician can handle the job. But for most owners, this is a very doable weekend project.

Choosing the Right Replacement Fuel Pump: OEM vs. Aftermarket

When it comes time to buy a new fuel pump, you have two main options: the genuine Honda part or an aftermarket replacement. Both have their pros and cons, and the right choice depends on your budget and your expectations.

Option 1: Genuine Honda Fuel Pump (16710-GET-013)

The OEM pump is the exact same part that came with your scooter from the factory . It is guaranteed to fit perfectly and perform exactly as designed. The genuine Honda fuel pump assembly is designed for the 2002–2009 Metropolitan and the 2003–2020 Ruckus . It includes all necessary components and delivers consistent fuel flow for optimal engine performance.

The downside is price. Genuine Honda parts are typically more expensive than aftermarket alternatives, and depending on where you shop, the OEM pump can cost anywhere from $50 to more than $100.

Option 2: Aftermarket Replacement Pumps

Aftermarket fuel pumps are manufactured by third-party companies and are designed to meet or exceed OEM specifications. They are often significantly cheaper than genuine Honda parts, and many come with warranties. For example, the Masday Scooter Fuel Pump is available for the 2002–2009 Metropolitan CHF50 and includes a fuel filter, fuel hose, and pipe clamps in the box . It has a 2-year warranty .

Another popular option is the Fuel Pump Factory (FPF) FP-109 for the 2002–2009 Metropolitan and 2003–2016 Ruckus . It is described as an exact OE replacement and is sold with a 12-month warranty .

Some aftermarket pumps are also sold with upgraded components, such as thicker fuel hoses and manganese steel pipe clamps, which can actually last longer than the original parts .

Key considerations when choosing an aftermarket pump:

  1. Check the OE part number. Make sure the replacement pump explicitly lists 16710-GET-013 or 16710-GET-003 as an interchange number .
  2. Check the included accessories. Some kits include a fuel filter and hose, which is convenient if your original filter has never been replaced .
  3. Check the warranty. A 12-month warranty is standard, but some manufacturers, like Masday, offer 2 years .
  4. Check the reviews. Look for pumps that have been tested on the Metropolitan or Ruckus specifically. Reviews from other owners are a good indicator of real-world reliability .

Why You Should Consider KEMSO Fuel Pumps

If you are looking for a reliable aftermarket fuel pump that delivers excellent performance and long-term durability, KEMSO is a brand worth considering. KEMSO specializes in high-performance fuel system components for motorcycles, scooters, and powersports vehicles, and their products are engineered to meet or exceed OEM standards .

Here is why KEMSO stands out from the crowd:

  1. High-performance design. KEMSO fuel pumps are designed to deliver a higher flow rate than stock pumps. In the case of one of their popular pumps for another Honda model, it delivers more than 20% more flow at 43 psi compared to the original OEM part . That extra flow means your engine gets the fuel it needs under load, during acceleration, and in hot weather conditions.

  2. Direct OEM replacement. KEMSO pumps are drop-in replacements. They are built to match the factory mounting points, electrical connectors, and hose connections, so installation is straightforward and does not require any modification .

  3. Built to last. KEMSO pumps are made from high-quality materials and use upgraded polymers, brushes, and commutators. These components are designed to handle modern ethanol-blended gasoline, which is notorious for causing premature wear in older pump designs .

  4. Lifetime warranty. KEMSO stands behind their products with a lifetime warranty. That is a level of confidence that most aftermarket brands simply do not offer. If your KEMSO pump ever fails, you are covered.

  5. Proven track record. KEMSO pumps are sold for a wide range of models, including BMW motorcycles, Kawasaki jet skis, Ducati sport bikes, KTM adventure bikes, and Honda vehicles ranging from the Civic to the CBR1000RR . Their engineers test each pump individually before it leaves the factory, and their quality control program follows ISO standards .

If you want a pump that gives you more than just a basic replacement—one that actually improves the performance and reliability of your 2009 Honda Metropolitan—KEMSO is the brand to trust. You can browse their full catalog and find the right pump for your scooter at their official website: https://www.kemsoracing.com/.

Extra Tips for Keeping Your Fuel Pump Healthy

Replacing the fuel pump is a one-time fix, but keeping it healthy over the long term is an ongoing effort. Here are a few practical habits that will extend the life of your new fuel pump:

1. Keep the tank at least a quarter full. The fuel pump relies on gasoline for cooling and lubrication. Running the tank dry on a regular basis shortens the pump’s life considerably .

2. Replace the fuel filter regularly. If your replacement pump came with a new filter, install it. If not, check the existing filter every 3,000 miles or so and replace it when it looks dirty. A clogged filter makes the pump work harder than it should .

3. Use clean, fresh gasoline. Old gas can form varnish and gunk that clogs the pump inlet. If your scooter has not been ridden in several months, drain the tank and refill it with fresh fuel .

4. Check the fuel lines. Rubber fuel lines can crack and soften over time. If you notice any cracks, replace them before they leak. The Masday kit, for example, includes a thickened fuel hose, which is a smart upgrade .

5. Listen to your scooter. If you hear the fuel pump getting louder, or if the engine starts to hesitate, do not ignore it. Catching a pump failure early can prevent a breakdown miles away from home.

Final Thoughts

The 2009 Honda Metropolitan is a stylish, economical, and reliable scooter, but like any machine, it needs maintenance as it ages. The fuel pump is one of the most critical components in the fuel delivery system, and when it fails, the scooter becomes unusable. Fortunately, the replacement process is well-documented, the parts are widely available, and the cost is reasonable.

To recap:

  • The 2009 Metropolitan uses an electromagnetic fuel pump mounted in the tank, controlled by the ECU .
  • The OEM part number is 16710-GET-013 .
  • Symptoms of failure include hard starting, sputtering, stalling, poor fuel economy, and abnormal whining noises .
  • You can test the pump yourself with a multimeter and a few simple checks.
  • Replacement takes about 1–2 hours and requires only basic hand tools.
  • You can choose between a genuine Honda pump or an aftermarket replacement.
  • For the best combination of performance, durability, and warranty coverage, consider a KEMSO fuel pump—visit their website at https://www.kemsoracing.com/ to find the right part for your scooter.

Keeping your Metropolitan running does not have to be a headache. With a little knowledge and the right parts, you can get back on the road quickly and ride with confidence knowing your fuel system is in good shape. If you are ever in doubt, remember that professional installation is always recommended when you are not comfortable working on your own scooter .


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