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Start ShoppingMIKUNI F990-793-004-P-8 Needle Jet - High-Performance Fuel Delivery for Carburetors
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Description
Upgrade your carburetor's fuel delivery system with MIKUNI's high-precision Needle Jet. This critical component ensures optimal fuel-air mixture for maximum power, efficiency, and engine longevity in motorcycles, ATVs, and other powersports vehicles.
Key Features
- Exact Fitment: Precision-machined for seamless compatibility with MIKUNI carburetor systems
- Flow Optimization: Advanced needle design improves fuel atomization for cleaner combustion
- Durable Construction: High-grade brass alloy resists corrosion and wear in harsh environments
- Easy Installation: Streamlined design simplifies replacement without compromising performance
Why Choose This Product
Whether you're tuning a high-performance motorcycle or maintaining an ATV, this Needle Jet delivers consistent fuel delivery under varying conditions. Its precision engineering ensures reliable operation, while the durable materials withstand extreme temperatures and contaminants. The straightforward installation process saves time and labor costs, making it an essential upgrade for riders seeking peak engine performance.
SKU:
GM173832A2
MPN:
F990-793-004-P-8
Category:
Intake/Carb/Fuel System
Brand:
MIKUNI
Stock:
In Stock
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Upgrade your carburetor's fuel delivery system with MIKUNI's high-precision Needle Jet. This critical component ensures optimal fuel-air mixture for maximum power, efficiency, and engine longevity in motorcycles, ATVs, and other powersports vehicles.
Key Features
- Exact Fitment: Precision-machined for seamless compatibility with MIKUNI carburetor systems
- Flow Optimization: Advanced needle design improves fuel atomization for cleaner combustion
- Durable Construction: High-grade brass alloy resists corrosion and wear in harsh environments
- Easy Installation: Streamlined design simplifies replacement without compromising performance
Why Choose This Product
Whether you're tuning a high-performance motorcycle or maintaining an ATV, this Needle Jet delivers consistent fuel delivery under varying conditions. Its precision engineering ensures reliable operation, while the durable materials withstand extreme temperatures and contaminants. The straightforward installation process saves time and labor costs, making it an essential upgrade for riders seeking peak engine performance.
| SKU | GM173832A2 |
|---|---|
| MPN | F990-793-004-P-8 |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Kawasaki | KLX450R | 2008-2013 |
| Suzuki | RMZ450 | 2006-2009 |
| KTM | 450 SX-F | 2007-2012 |
| Honda | CRF450R | 2005-2010 |
Frequently Asked Questions
Fits Mikuni TM38, TM40, and BS series carburetors commonly found on 4-stroke dirt bikes like Kawasaki KLX, Honda CRF, Suzuki RMZ.
Yes, genuine Mikuni OEM needle jet (part # F990-793-004-P-8).
Often used with main/pilot jet changes for altitude, mods, or altitude compensation.
Provides precise fuel metering for better throttle response when matched to bike's setup.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Small flathead screwdriver
- Needle nose pliers
- Carb cleaner
Pro Tips
- Remove carburetor fully for best access. Mark jets before removal to avoid mix-ups. Test jetting with plug reads after install.
Common Mistakes to Avoid
- Not cleaning carb passages thoroughly before install
- Incorrect slide/needle alignment
Comparison vs Stock/OEM
Direct OEM replacement for worn/stock needle jets in Mikuni carbs
Improvements
- Restores precise fuel delivery
- Better mid-range throttle response when tuned
Considerations
- No performance gain without full jetting adjustment
Durability & Warranty
Expected Lifespan
Indefinite with proper jetting (brass construction)
Warranty
Mikuni lifetime warranty against defects
Maintenance
Inspect during carb cleaning (every 20-50 hours). Replace if eroded or clogged.
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