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Start ShoppingMIKUNI F990-793-004-P-4 Needle Jet - High-Performance Carburetor Fuel System Component
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Description
Upgrade your powersports engine's fuel delivery system with the MIKUNI F990-793-004-P-4 Needle Jet. This precision-crafted component ensures accurate fuel metering for responsive throttle control and consistent power output across a wide range of operating conditions.
Key Features
- Exact Fuel Metering: Advanced needle design delivers precise fuel-air mixture ratios for improved engine efficiency and performance.
- Durable Construction: High-grade brass alloy withstands extreme temperatures and corrosive environments for long-lasting reliability.
- Seamless Compatibility: Engineered to fit original MIKUNI carburetor systems, ensuring perfect integration with existing fuel delivery components.
- Easy Installation: Streamlined design allows for quick replacement without requiring major system modifications.
Why Choose This Product
Whether you're tuning a high-performance motorcycle, ATV, or off-road vehicle, this Needle Jet offers the precision engineering needed to maximize engine potential. Its corrosion-resistant materials ensure consistent performance in demanding conditions, while the optimized fuel flow characteristics help maintain power delivery across varying RPM ranges. Riders who prioritize reliability and performance will appreciate the seamless integration with MIKUNI systems and the peace of mind that comes with using factory-spec components.
SKU:
GMCDAAFB2C
MPN:
F990-793-004-P-4
Category:
Intake/Carb/Fuel System
Brand:
MIKUNI
Stock:
In Stock
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Upgrade your powersports engine's fuel delivery system with the MIKUNI F990-793-004-P-4 Needle Jet. This precision-crafted component ensures accurate fuel metering for responsive throttle control and consistent power output across a wide range of operating conditions.
Key Features
- Exact Fuel Metering: Advanced needle design delivers precise fuel-air mixture ratios for improved engine efficiency and performance.
- Durable Construction: High-grade brass alloy withstands extreme temperatures and corrosive environments for long-lasting reliability.
- Seamless Compatibility: Engineered to fit original MIKUNI carburetor systems, ensuring perfect integration with existing fuel delivery components.
- Easy Installation: Streamlined design allows for quick replacement without requiring major system modifications.
Why Choose This Product
Whether you're tuning a high-performance motorcycle, ATV, or off-road vehicle, this Needle Jet offers the precision engineering needed to maximize engine potential. Its corrosion-resistant materials ensure consistent performance in demanding conditions, while the optimized fuel flow characteristics help maintain power delivery across varying RPM ranges. Riders who prioritize reliability and performance will appreciate the seamless integration with MIKUNI systems and the peace of mind that comes with using factory-spec components.
| SKU | GMCDAAFB2C |
|---|---|
| MPN | F990-793-004-P-4 |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Honda | CRF450R | 2008-2014 |
| Kawasaki | KX450F | 2009-2015 |
| Yamaha | YZ450F | 2010-2016 |
| Suzuki | RMZ450 | 2007-2013 |
Frequently Asked Questions
P-4 refers to the needle jet clipping size of 4.0, which controls fuel flow in the mid-range throttle position.
Yes, for many Mikuni-equipped bikes. Confirm your carb model (often TM38/TM40) and stock jet size.
No, this is specifically for Mikuni carbs. Keihin uses different jet numbering.
Often yes, pair with main and pilot jets for complete tuning based on your altitude and mods.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Small flathead screwdriver
- Carburetor cleaning kit
- Compressed air
Pro Tips
- Use carb cleaner to remove old debris from jet seat
- Always check needle clip position after install
Common Mistakes to Avoid
- Not cleaning carb passages thoroughly before install
- Installing without verifying float height
Comparison vs Stock/OEM
Direct replacement for worn OEM needle jets in Mikuni carbs
Improvements
- Precise fuel metering for better throttle response
- Improved mid-range power delivery
Considerations
- Genuine Mikuni, not aftermarket knockoff
Durability & Warranty
Expected Lifespan
2-5 years typical with proper jetting
Warranty
Limited lifetime against manufacturing defects (Mikuni policy)
Maintenance
Inspect during annual carb cleaning, replace if scored or corroded
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