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Start ShoppingMIKUNI FVM24/557-2.5 Needle Valve Round Pump - Precision Fuel Delivery for Carburetors
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Description
The MIKUNI FVM24/557-2.5 Needle Valve Round Pump is a critical component for achieving precise fuel metering in carbureted engines. This high-quality replacement part ensures smooth fuel delivery, enhancing engine performance and reliability for motorcycles, ATVs, and other powersports vehicles.
Key Features
- Precision Fuel Metering: Advanced design ensures accurate fuel flow for optimal engine performance.
- Durable Construction: High-grade materials withstand harsh operating conditions for long-lasting reliability.
- Compatibility: Specifically engineered for MIKUNI carburetor systems to ensure seamless integration.
- Easy Installation: Streamlined design simplifies replacement without compromising performance.
Why Choose This Product
Upgrade your fuel system with a MIKUNI-certified replacement that delivers consistent power output and improved throttle response. This needle valve pump is essential for maintaining peak engine efficiency, reducing fuel waste, and ensuring smooth operation in demanding powersports environments. Trust the reliability of MIKUNI components for uncompromised performance.
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The MIKUNI FVM24/557-2.5 Needle Valve Round Pump is a critical component for achieving precise fuel metering in carbureted engines. This high-quality replacement part ensures smooth fuel delivery, enhancing engine performance and reliability for motorcycles, ATVs, and other powersports vehicles.
Key Features
- Precision Fuel Metering: Advanced design ensures accurate fuel flow for optimal engine performance.
- Durable Construction: High-grade materials withstand harsh operating conditions for long-lasting reliability.
- Compatibility: Specifically engineered for MIKUNI carburetor systems to ensure seamless integration.
- Easy Installation: Streamlined design simplifies replacement without compromising performance.
Why Choose This Product
Upgrade your fuel system with a MIKUNI-certified replacement that delivers consistent power output and improved throttle response. This needle valve pump is essential for maintaining peak engine efficiency, reducing fuel waste, and ensuring smooth operation in demanding powersports environments. Trust the reliability of MIKUNI components for uncompromised performance.
| SKU | GM71EC42C9 |
|---|---|
| MPN | FVM24/557-2.5 |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Suzuki | RM250 | 1986-2003 |
| Kawasaki | KX250 | 1990-2004 |
| Yamaha | YZ250 | 1987-2002 |
| Honda | CR250R | 1993-2007 |
| All Years |
Frequently Asked Questions
Fits Mikuni TM24, TM38, TM40, FCR39/41 series carbs. Confirm your carb model before purchase.
Yes, features Viton rubber tip rated for modern E10 fuels.
Not always, but recommended if float is worn or damaged. Check float height spec.
Often yes, if caused by worn needle/seat. Inspect o-rings and float first.
2.5mm is larger orifice for higher flow applications like big bore or high altitude setups.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Small flathead screwdriver
- needle nose pliers
- carb rebuild kit optional
Pro Tips
- Use carb cleaner to clean seat before install. Set float height to carb spec (usually 10-12mm). Test for leaks with clear fuel line
Common Mistakes to Avoid
- Not adjusting float height after install
- Damaging Viton tip during insertion
Comparison vs Stock/OEM
Aftermarket upgrade over OEM soft rubber needle valves
Improvements
- Viton material resists ethanol/chemical degradation
- More precise fuel metering
- Better sealing under high vibration
Considerations
- Slightly higher flow may require jetting adjustments
Durability & Warranty
Expected Lifespan
2-5 years or 100+ hours racing with proper maintenance
Warranty
1 year Mikuni manufacturer warranty
Maintenance
Inspect during annual carb service. Clean seat with non-abrasive cleaner. Replace if tip swells or leaks
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