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Start ShoppingMIKUNI FN224103-12.5 Bleed Pilot Jets - Precision Fuel Delivery for High-Performance Engines
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Description
Upgrade your carburetor system with MIKUNI's precision-engineered bleed pilot jets, designed to deliver flawless fuel-air mixture for maximum engine performance and efficiency. These critical components ensure smooth idling, responsive throttle, and consistent power output across a range of riding conditions.
Key Features
- Exact Fuel Flow Calibration: Precisely metered fuel delivery for optimal combustion efficiency and engine responsiveness.
- Durable Brass Construction: Corrosion-resistant materials withstand harsh environments and prolonged use.
- Easy Installation: Compatible with standard MIKUNI carburetor setups for quick, hassle-free replacement.
- Performance Optimization: Fine-tune fuel delivery for racing, off-road, or street use with minimal adjustments.
Why Choose This Product
MIKUNI bleed pilot jets deliver unmatched reliability and performance for riders who demand precision from their engines. Whether you're modifying a classic motorcycle or tuning a high-output engine, these jets provide the accuracy needed to achieve peak power while maintaining fuel efficiency. Their robust construction ensures long-lasting performance, while the straightforward installation makes them an essential upgrade for any carburetor system.
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Upgrade your carburetor system with MIKUNI's precision-engineered bleed pilot jets, designed to deliver flawless fuel-air mixture for maximum engine performance and efficiency. These critical components ensure smooth idling, responsive throttle, and consistent power output across a range of riding conditions.
Key Features
- Exact Fuel Flow Calibration: Precisely metered fuel delivery for optimal combustion efficiency and engine responsiveness.
- Durable Brass Construction: Corrosion-resistant materials withstand harsh environments and prolonged use.
- Easy Installation: Compatible with standard MIKUNI carburetor setups for quick, hassle-free replacement.
- Performance Optimization: Fine-tune fuel delivery for racing, off-road, or street use with minimal adjustments.
Why Choose This Product
MIKUNI bleed pilot jets deliver unmatched reliability and performance for riders who demand precision from their engines. Whether you're modifying a classic motorcycle or tuning a high-output engine, these jets provide the accuracy needed to achieve peak power while maintaining fuel efficiency. Their robust construction ensures long-lasting performance, while the straightforward installation makes them an essential upgrade for any carburetor system.
| SKU | GMC576A7DB |
|---|---|
| MPN | FN224103-12.5 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | Models using Mikuni VM/PF series carbs (e.g., Yamaha YZ/WR, Honda CR/XR, Kawasaki KX/KLX, Suzuki RM/DRZ) | 1980-2025 |
| Honda | XR series (XR250R, XR400R, XR650R) | 1990-2010 |
| Yamaha | WR250F, YZ250F | 2000-2020 |
| Kawasaki | KX250, KLX300 | 1985-2015 |
Frequently Asked Questions
Fits Mikuni VM26-VM34, PF30-PF39 series carbs commonly found on dirt bikes, dual sports, and ATVs from Yamaha, Honda, Kawasaki, Suzuki.
Use plug chop method or EGA analysis. Lean low-end symptoms (hanging idle, popping on decel) often indicate need for larger pilot.
Yes, bleed pilot jets have an additional air bleed hole for better low-speed fuel atomization and easier tuning.
No, this is for carbureted engines only.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet cleaning wire or compressed air
Pro Tips
- Mark your stock jet size before removal. Test plug chop after install to verify jetting. Use in pairs with main jets for balanced tuning.
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Installing without noting original jet size
Comparison vs Stock/OEM
Aftermarket Mikuni precision-machined brass vs OEM (often same Mikuni source)
Improvements
- Consistent flow calibration
- Bleed hole for superior low-speed tuning
- More sizes available for precise jetting
Considerations
- None significant; direct OEM replacement/upgrade
Durability & Warranty
Expected Lifespan
Indefinite with proper maintenance (clean every 20-50 hours)
Warranty
Limited lifetime against manufacturing defects (Mikuni standard)
Maintenance
Clean with carb cleaner and compressed air; inspect for clogging during service
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