1. ATV Fuel Pumps For Sale
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  3. MARINEPARTSDISTRIBUTORS 26-1239A3

MARINEPARTSDISTRIBUTORS 26-1239A3 Carburetor Atv Kit 49CC

fits model: Kfx50, Ksf50. make: Kawasaki. year: 2003–2006.

26-1239a3 Marinepartsdistributors Carburetor Overhaul Kit Kawasaki Kfx50 Ksf50 49cc 2003-2006 Atv Numbers

( Brand: Marinepartsdistributors ), ( Manufacturer Part Number: 26-1239A3 ), ( Part Type: Carburetor ), ( California Prop 65 Warning: This Product May Expose You To Chemicals Which Are Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov ), ( Country Of Origin: China ), ( Source: Aftermarket )

Review MARINEPARTSDISTRIBUTORS Carburetor Overhaul Kit Kawasaki 49cc Atv Numbers fits KFX50 KSF50 2003–2006

The **26-1239A3 Carburetor Kit** is a meticulously engineered upgrade designed to revitalize the performance of Kawasaki KFX50 and KSF50 ATVs from the model years 2003 through 2006, each equipped with the iconic 49cc single-cylinder engine. This high-quality kit replaces the stock carburetor a critical component that governs fuel-air mixture, throttle response, and overall engine efficiency with a precision-crafted alternative that delivers enhanced power, smoother operation, and improved fuel economy. Engineered to fit seamlessly into the stock intake manifold and throttle linkage, the kit features a **reliable piston-style carburetor** with a durable needle and jet assembly, allowing for fine-tuned adjustments to optimize throttle response and low-end torque. The kit includes a **new gasket set** to ensure a leak-free seal, preventing fuel leaks and vacuum loss that can degrade performance over time. Additionally, the upgraded carburetor incorporates a **high-flow venturi** and a **replacement float bowl**, which helps maintain consistent fuel delivery under varying loads, whether cruising on trails or accelerating under heavy loads. For enthusiasts seeking a balance between performance and reliability, this kit is an ideal solution, offering a noticeable improvement in throttle smoothness, better cold-start performance, and reduced fuel consumption without the need for extensive modifications to the engine bay. Whether restoring a neglected ATV or upgrading a well-maintained one, the **26-1239A3 Carburetor Kit** provides a straightforward yet effective way to breathe new life into Kawasaki s compact yet capable 49cc engines, ensuring they run with the precision and responsiveness of a freshly rebuilt unit.

### **Pros and Cons of buying a 26-1239A3 Carburetor Kit for a Kawasaki KFX50/CSF50 (49cc, 2003 2006 ATV)**

#### **Pros:**

1. **Improved Performance** The 26-1239A3 carburetor is designed to provide better fuel-air mixture control, which can enhance throttle response, acceleration, and overall power output compared to the stock carburetor. This is particularly useful if the original carb is clogged or worn out.

2. **Better Fuel Efficiency** A properly adjusted carburetor can optimize fuel consumption, reducing unnecessary fuel waste while maintaining power. This is especially beneficial for off-road use where fuel economy matters.

3. **Easier Tuning & Adjustability** The 26-1239A3 is a more modern and refined carburetor compared to the stock unit, offering better idle stability and smoother operation. It allows for finer adjustments to the idle speed, mixture screws, and pilot jet, which can help fine-tune the engine for different conditions.

4. **Compatibility with Modifications** If you plan to modify your ATV (e.g., upgrading the exhaust, installing a performance air filter, or adjusting the compression), this carburetor will work better with those changes than the stock unit, which may struggle with increased airflow.

5. **Reduced Carbon Buildup** A well-functioning carburetor helps prevent excessive carbon deposits on intake valves and pistons, which can occur with a clogged or improperly adjusted stock carb. This leads to longer engine life and fewer internal issues.

6. **Easier to Source Parts** Since this is a widely used aftermarket carburetor, replacement jets, gaskets, and other components are readily available, making maintenance simpler.

7. **Cost-Effective Upgrade** Compared to a full engine rebuild or replacement, upgrading the carburetor is a relatively inexpensive way to restore performance and reliability.

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#### **Cons:**

1. **Installation Complexity** While not extremely difficult, installing a new carburetor requires some mechanical skill, including proper alignment, vacuum hose reconnection, and throttle cable adjustment. If you re not comfortable with basic engine work, you may need to pay a mechanic for installation.

2. **Learning Curve for Tuning** Unlike the stock carb, which may run "out of the box" with minimal adjustments, the 26-1239A3 requires careful tuning of the idle mixture, pilot jet, and main jet. Improper adjustments can lead to rough idling, poor acceleration, or even stalling.

3. **Potential for Over-Tuning** If you re not experienced with carburetor tuning, you might accidentally lean out the mixture too much, causing overheating, detonation, or long-term engine damage. Starting with stock or slightly richer settings and making gradual adjustments is recommended.

4. **O-Ring and Gasket Replacement Needed** The kit may not include new gaskets or O-rings, which are critical for a leak-free seal. Failing to replace these can lead to vacuum leaks, fuel leaks, or poor performance.

5. **Stock Carburetor May Still Work Fine** If your original carburetor is clean and properly adjusted, upgrading may not provide noticeable benefits. In some cases, a thorough cleaning and jet adjustment of the stock carb could be just as effective and cheaper.

6. **Compatibility with Stock Components** If other parts of your ATV s engine (e.g., exhaust, intake, or ignition timing) are not optimized for the new carb, performance gains may be limited. A full engine tune-up (spark plugs, air filter, fuel lines) is recommended for best results.

7. **Risk of Counterfeit or Low-Quality Kits** When purchasing online, there s a chance of receiving a knockoff or poorly made carburetor. Buying from a reputable dealer (e.g., Kawasaki-approved parts stores, trusted aftermarket suppliers) minimizes this risk.

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### **Conclusion:**

The **26-1239A3 carburetor kit** is a solid upgrade for a **2003 2006 Kawasaki KFX50/CSF50**, offering improved performance, better fuel efficiency, and easier tuning compared to the stock carburetor. It is particularly beneficial if your original carb is dirty, worn, or struggling with modifications. However, it requires proper installation and tuning to avoid issues like rough idling or engine damage.

If your ATV is running poorly due to a clogged or failing stock carb, this upgrade is **worth considering**. If your engine is already in good condition, a thorough cleaning and adjustment of the original carb may suffice. For best results, pair the carburetor upgrade with a **full engine service** (oil change, air filter, spark plugs) and gradual tuning.

### **Recommendation:**

- **Buy from a trusted source** (e.g., Kawasaki parts dealer, reputable aftermarket supplier like **Kawasaki Performance Parts, Walmart, or Amazon with verified sellers**).

- **Replace all gaskets and O-rings** to ensure a proper seal.

- **Follow a step-by-step tuning guide** (e.g., from **Kawasaki manuals, YouTube tutorials, or aftermarket forums**) to adjust the idle mixture and jets correctly.

- **Start with stock or slightly richer settings** and make incremental adjustments to avoid leaning out the mixture.

- **Consider a full engine tune-up** (including air filter, spark plugs, and fuel lines) for optimal performance.

- **If unsure about installation/tuning**, consult a mechanic or experienced ATV tuner.

**Final Verdict:** The **26-1239A3 carburetor kit is a worthwhile upgrade** for those looking to restore or enhance their KFX50/CSF50 s performance, provided it is installed and tuned correctly. For casual riders with no performance goals, a stock carburetor cleaning may be sufficient.

Details:

All parts sold are new. Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but designed to function same as - if better than. As a parts distributor we mostly sell aftermarket any OEM would be noted as such. Carburetor Overhaul Kit Kawasaki KFX50 KSF50 49cc 2003 2006 ATV NUMBERS: Replaces Part Numbers Specifications.

specifications fuepumintak:

  • for models: Kfx50, Ksf50
  • for makes: Kawasaki
  • for years: 2003-2006
  • brand: Marinepartsdistributors
  • mpn: 26-1239a3
  • part type: Carburetor
  • california prop 65 warning: This Product May Expose You To Chemicals Which Are Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov
  • country of origin: China
  • source: Aftermarket

general fuepumintak:

  • ATV, Side-by-Side UTV Parts Accessories > Air Intake Fuel Delivery > Fuel Pumps Sending Units
  • condition: New

payments fuepumintak:

  • other
  • credit card: Discover
  • wallet: Google-pay

seller fuepumintak:

  • rating: 98.7%
  • city: Deerfield Beach, Florida
  • # reviews: 21858

shipping fuepumintak:

  • type: Fixed
  • class: Economy, Standard, Expedited, One-day
  • service: Economy, Standard, Expedited, Overnight
  • transit: 3-7 Days
  • cost: $0.00

returns fuepumintak:

  • policy: Returns Accepted
  • paid by: Seller
  • time: 30 Days

offer fuepumintak:

  • availability: In Stock
  • sold: 0
  • started: March 5, 2026
  • quantity: 7
  • options: Ship-to-home
for models: kfx50, ksf50, for makes: kawasaki, for years: 2003-2006, part type: carburetor, california prop 65 warning: this product may expose you to chemicals which are known to the state of california to cause cancer and birth defects or other reproductive harm. for more information go to www.p65warnings.ca.gov, country of origin: china, source: aftermarket,
category: atv parts > atv, side-by-side utv parts accessories > air intake fuel delivery > fuel pumps sending units, sku: 5217059003464633,
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