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Start ShoppingMIKUNI FN151067-50 Bleed Pilot Jet - Brass Carburetor Jet for Fine-Tuning
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Description
Upgrade your motorcycle's fuel delivery system with this high-precision MIKUNI bleed pilot jet. Engineered for carburetor fine-tuning, this brass jet ensures optimal air-fuel ratios for improved power and efficiency.
Key Features
- Brass Construction: Durable, corrosion-resistant material for long-lasting performance in harsh conditions.
- Standard Mikuni Threading: M5 x 0.75 threading ensures seamless compatibility with most Mikuni carburetor models.
- 50cc Main Jet Equivalent: Precise flow rate for balanced fuel delivery across a range of engine speeds.
Why Choose This Product
This bleed pilot jet is essential for riders seeking to optimize their motorcycle's performance. Its brass construction resists clogging and maintains consistent fuel flow, while the standard threading simplifies installation. Whether you're tuning for racing or daily riding, this jet delivers reliable, accurate fuel metering to enhance engine responsiveness and throttle control. Perfect for mechanics and enthusiasts looking to achieve peak performance from their powersports equipment.
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Upgrade your motorcycle's fuel delivery system with this high-precision MIKUNI bleed pilot jet. Engineered for carburetor fine-tuning, this brass jet ensures optimal air-fuel ratios for improved power and efficiency.
Key Features
- Brass Construction: Durable, corrosion-resistant material for long-lasting performance in harsh conditions.
- Standard Mikuni Threading: M5 x 0.75 threading ensures seamless compatibility with most Mikuni carburetor models.
- 50cc Main Jet Equivalent: Precise flow rate for balanced fuel delivery across a range of engine speeds.
Why Choose This Product
This bleed pilot jet is essential for riders seeking to optimize their motorcycle's performance. Its brass construction resists clogging and maintains consistent fuel flow, while the standard threading simplifies installation. Whether you're tuning for racing or daily riding, this jet delivers reliable, accurate fuel metering to enhance engine responsiveness and throttle control. Perfect for mechanics and enthusiasts looking to achieve peak performance from their powersports equipment.
| SKU | GMFCEB0947 |
|---|---|
| MPN | FN151067-50 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | TM series carbs (e.g., TM40, TM42) | 1980-2025 |
| Honda | CRF250R, CRF450R | 1990-2025 |
| Yamaha | YZ250F, WR250F | 1985-2025 |
Frequently Asked Questions
Bleed pilot jets have small holes that allow air into the pilot circuit, leaning out the low-speed fuel mixture for better response and to prevent bogging.
Start with your current pilot jet size and go up/down 1-2 numbers based on plug reads. Larger number = leaner (more bleed).
Designed for Mikuni TM series carbs. Check your carb model; not for stock Keihin or CV carbs.
Often used with main jets and needle changes for complete tuning, especially with exhaust/air filter mods.
Installation Guide
Difficulty
Easy
Est. Time
10 min
Tools Required
- Small flathead screwdriver
- Jet cleaning wire or carb cleaner
Pro Tips
- Mark your old jet size before swapping. Test at idle and 1/4 throttle after install. Use with main jets for full tune.
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Confusing pilot screw adjustments with jet changes
Comparison vs Stock/OEM
Aftermarket tuning jet vs stock fixed pilot circuit
Improvements
- Precise low-speed tuning
- Better throttle response
- Adaptable to mods/altitude
Considerations
- Requires tuning knowledge; stock is plug-and-play
Durability & Warranty
Expected Lifespan
Indefinite with proper cleaning (brass doesn't wear)
Warranty
Limited lifetime from Mikuni against defects
Maintenance
Clean with spray carb cleaner every 10-20 hours; avoid dropping in solvent
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