2005 Honda Metropolitan Fuel Pump: Complete Replacement Guide and Best Options

Here is the bottom line: If you own a 2005 Honda Metropolitan, your scooter uses an electric fuel pump located inside the fuel tank under the floorboard. The exact OEM part number you need is 16710-GET-013, and this pump is shared with other Honda Ruckus models from the same era. If your Metropolitan is sputtering, hard to start, or stalling, the fuel pump is often the culprit. Replacing it is a straightforward job that any handy owner can handle in about two hours.

The 2005 Honda Metropolitan is part of the CHF50 generation. It came in both the standard Metropolitan and the Metropolitan II versions . This model features a lightweight 49cc four-stroke liquid-cooled engine with an electric starter and an automatic V-Matic transmission . The fuel system relies on an electromagnetic fuel pump mounted inside the fuel tank, tucked under the scooter's floorboard . This design keeps the pump cool and helps create generous underseat storage space for a helmet or groceries.

Signs Your 2005 Metropolitan Fuel Pump Is Failing

Before you tear anything apart, make sure you are dealing with a bad pump and not something simpler like a clogged fuel filter or a dead battery. Here are the most common symptoms of a failing fuel pump on the 2005 Metropolitan:

1. Hard Starting or No Start
If you turn the key and the engine cranks but refuses to fire up, the pump may not be delivering fuel to the carburetor. You can listen near the floorboard for a quiet whirring sound when you turn the ignition to the "ON" position. No sound often means a dead pump or an electrical issue.

2. Engine Sputters at Higher Speeds
The Metropolitan tops out around 35 mph under normal conditions . If the scooter runs fine at idle but sputters, hesitates, or loses power when you open the throttle, the pump might be weak and unable to keep up with fuel demand.

3. Sudden Stalling While Riding
A failing pump can quit unexpectedly as you ride, causing the engine to die. After it sits for a few minutes, the pump may cool down and work again temporarily. This intermittent stalling pattern is a strong indicator that the fuel pump needs replacement.

4. Loss of Power on Hills
The 2005 Metropolitan already has modest power with its 49cc engine. If you notice extra sluggishness going up inclines, the pump may not be maintaining consistent fuel pressure. Your scooter should feel responsive; if it feels gutless, check the fuel delivery system.

5. Whining Noise from the Fuel Tank Area
A healthy electric fuel pump makes a soft, steady hum. If you hear a loud whining, screeching, or grinding noise coming from under the floorboard, the pump bearings or internal components are wearing out. This noise means replacement is imminent.

OEM Part Number and Compatibility for 2005 Honda Metropolitan

The correct OEM replacement fuel pump assembly for a 2005 Honda Metropolitan is 16710-GET-013 . This part is also listed under the older number 16710-GET-003 for some model years . When ordering, always verify which number is printed on your original pump.

This pump fits a wide range of Honda scooters, making it easy to find:

  • 2002-2009 Honda Metropolitan CHF50 (all sub-models including CHF50A, CHF50S, CHF50SP)
  • 2002-2005 Honda Metropolitan II CHF50P (including CHF50PA and CHF50PS)
  • 2003-2016 Honda Ruckus NPS50 (including NPS50S models)

Important: According to the Honda Metropolitan service manual, when you test the fuel pump, it should deliver at least 100 cm³ (3.4 US oz) of fuel per minute. Anything less and the pump should be replaced . You can measure this by disconnecting the fuel hose from the carburetor, turning the ignition on for five seconds, collecting the fuel in a graduated container, and multiplying that volume by twelve to get the minute rate .

How to Replace the Fuel Pump on a 2005 Honda Metropolitan

Replacing the fuel pump on your 2005 Metropolitan is a job you can do in your driveway with basic hand tools. The pump sits under the floorboard, not inside a drop-down fuel tank like on a car, which makes things much easier.

Tools and Supplies You Will Need

  • Replacement fuel pump assembly (16710-GET-013 or equivalent)
  • Socket set with extensions
  • Flathead and Phillips screwdrivers
  • Pliers
  • Clean rags
  • Small container for any spilled fuel
  • Safety glasses and gloves

Step 1: Disconnect the Battery

Safety comes first. Remove the seat to access the battery. Disconnect the negative terminal (black wire) to prevent any electrical shorts or sparks while you work near fuel components .

Step 2: Remove the Floorboard and Lower Body Panels

The fuel pump is located under the scooter's floorboard. Remove the lower body cover and floorboard panels. You will need to unscrew several Phillips-head screws and maybe a few push rivets. Keep them organized for reinstallation .

Step 3: Locate and Disconnect the Fuel Pump

Once the panels are off, you will see the fuel pump mounted on top of the fuel tank. It has two hoses and a 2-pin electrical connector . Carefully:

  • Disconnect the 2P connector: Press the tab and pull apart.
  • Disconnect the fuel hoses: Use pliers to squeeze the hose clamps and slide them back. Pull the hoses off the pump nipples. Have a rag ready to catch a few drops of gasoline.

Step 4: Remove the Old Fuel Pump

The pump is held in place by a bolt and a nut on a metal stay bracket . Remove the bolt and nut, then lift the pump and bracket out of the tank. Be careful not to bend or damage the fuel level sending unit float as it comes out .

Step 5: Install the New Fuel Pump

Take your new pump assembly and compare it side by side with the old one. Make sure the fuel hose barbs, electrical connector, and mounting bracket align the same way . Lower the new pump into the tank, making sure the seal ring sits flush against the tank opening. Reinstall the bolt, nut, and stay bracket. Tighten them snugly but do not overtighten .

Step 6: Reconnect Hoses and Wiring

Push the fuel hoses back onto the new pump barbs. Slide the clamps into position and squeeze them tight. Plug the 2-pin electrical connector back in until it clicks .

Step 7: Reinstall the Panels and Battery

Put the floorboard and lower body panels back in place. Tighten all screws and push rivets. Reconnect the negative battery terminal.

Step 8: Prime and Test

This step matters. Before hitting the starter, turn the ignition key to the "ON" position for about three seconds, then turn it off. Repeat this cycle two or three times. This primes the fuel system and lets the new pump build pressure . Then start the engine. Let it idle for a minute and check for any fuel leaks around the pump and hoses. Take a short test ride and confirm smooth acceleration and stable idle.

Where to Buy the Best Fuel Pump for Your 2005 Honda Metropolitan

You have options when buying a replacement pump. You can buy genuine Honda OEM parts, or you can go with a high-quality aftermarket brand that delivers the same or better performance for a better price.

KEMSO Racing offers an excellent alternative for Honda Metropolitan owners. KEMSO fuel pumps are designed to meet or exceed OEM specifications, ensuring a direct fit and proper fuel flow rates for your 2005 Metropolitan . These pumps are made with high-quality materials that resist wear and corrosion.

Key benefits of choosing a KEMSO fuel pump:

  • Performance: KEMSO pumps provide a stable, reliable fuel supply that optimizes engine power and fuel economy.
  • OEM Replacement: They are engineered as exact drop-in replacements. No modifications or adapters are needed. You take out the old pump and put the new one in.
  • Durability: KEMSO uses premium ABS and metal materials for robust construction that lasts.
  • Lifetime Warranty: KEMSO stands behind their products. You get peace of mind that your investment is protected.

To find the right KEMSO fuel pump for your 2005 Honda Metropolitan, visit their website at https://www.kemsoracing.com/.

Frequently Asked Questions About the 2005 Honda Metropolitan Fuel Pump

Q: Is the 2005 Metropolitan fuel pump mechanical or electric?
A: It is an electric fuel pump. Earlier Metropolitan models (2002-2009) are often described as using a vacuum-operated mechanical pump in some general guides, but the 2005 Metropolitan specifically uses an electromagnetic (electric) fuel pump mounted inside the fuel tank .

Q: How long should a replacement fuel pump last?
A: A quality replacement pump like KEMSO can last the life of the scooter if you maintain it properly. Keep the fuel tank above a quarter full to help cool the pump, and use clean gasoline to prevent debris from clogging the internal strainer .

Q: Do I need to replace the fuel filter at the same time?
A: It is strongly recommended. The Metropolitan typically has a small inline fuel filter between the pump and the carburetor. Replacing it costs only a few dollars and ensures your new pump does not have to fight against a clogged filter .

Q: Can I just rebuild my existing fuel pump?
A: No. The Metropolitan's fuel pump is a sealed assembly. There are no serviceable internal parts. If it fails, you must replace the entire unit.

Q: Why does my new pump seem louder than the old one?
A: Some aftermarket pumps are slightly louder than OEM units, especially when new. A steady hum is normal. A screeching or grinding noise is not. If the sound bothers you, double-check that the pump is securely mounted and not vibrating against the body panels.

Tips to Extend the Life of Your New Fuel Pump

Once you have a new pump installed, a few simple habits will keep it working for years:

Keep the tank above a quarter full. The fuel in the tank acts as a coolant for the electric pump. Running the tank dry regularly causes the pump to overheat and wear out prematurely .

Use quality gasoline. Gas from top-tier stations contains more detergent additives that keep the fuel system clean. Avoid low-quality gas that may contain water or sediment.

Replace the fuel filter annually. An inline filter costs next to nothing. A clogged filter forces the fuel pump to work harder and can cause premature failure .

Do not let the scooter sit for months with old gas. Stale gasoline can turn to varnish and clog the pump's internal strainer. If you store the Metropolitan for the winter, add a fuel stabilizer or drain the tank.

Listen for changes. If you hear the pump suddenly getting louder, it is trying to tell you something is wrong. Check the filter and fuel lines before the pump fails.

Final Thoughts

The 2005 Honda Metropolitan is a reliable, fun scooter for commuting and cruising around town. When the fuel pump fails, do not panic. The replacement process is simple, replacement parts are widely available, and a good quality pump like those from KEMSO can get you back on the road quickly. Confirm your model year and part number (16710-GET-013), take your time with the installation, and test thoroughly before hitting the road. A well-maintained Metropolitan with a fresh fuel pump will run smoothly for thousands more miles.

For the best replacement option, check out KEMSO Racing at https://www.kemsoracing.com/ for a high-quality, OEM-compatible fuel pump that comes with a lifetime warranty.


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