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Start ShoppingMIKUNI FBS30/96-52.5 Bleed Pilot Jets - Precision Brass Jets for Optimal Air-Fuel Tuning
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Description
Upgrade your MIKUNI carburetor's performance with these precision-engineered bleed pilot jets. Designed for accurate air-fuel ratio control, these brass jets deliver consistent throttle response and optimized power delivery for racing and off-road applications.
Key Features
- Material: Durable brass construction resists corrosion and maintains precise flow characteristics under extreme conditions
- Dimensions: 30mm clip height with 96mm bleed hole size for fine-tuned air bleed adjustment
- Main Bore: 52.5mm main jet size ensures optimal fuel flow for high-performance engines
- Weight: Lightweight 5g design reduces moving parts mass for responsive throttle control
- Flow Rate: 52.5 main jet size with air bleed tuning capabilities for precise fuel metering
Why Choose This Product
These MIKUNI jets provide unmatched accuracy for air-fuel ratio tuning, ensuring peak engine performance across a wide range of operating conditions. The brass material offers superior heat conductivity and flow consistency, while the precise dimensional specifications allow for seamless integration with MIKUNI carburetor systems. Riders will experience smoother power delivery, improved fuel efficiency, and enhanced throttle response, making these jets essential for competitive powersports applications.
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Upgrade your MIKUNI carburetor's performance with these precision-engineered bleed pilot jets. Designed for accurate air-fuel ratio control, these brass jets deliver consistent throttle response and optimized power delivery for racing and off-road applications.
Key Features
- Material: Durable brass construction resists corrosion and maintains precise flow characteristics under extreme conditions
- Dimensions: 30mm clip height with 96mm bleed hole size for fine-tuned air bleed adjustment
- Main Bore: 52.5mm main jet size ensures optimal fuel flow for high-performance engines
- Weight: Lightweight 5g design reduces moving parts mass for responsive throttle control
- Flow Rate: 52.5 main jet size with air bleed tuning capabilities for precise fuel metering
Why Choose This Product
These MIKUNI jets provide unmatched accuracy for air-fuel ratio tuning, ensuring peak engine performance across a wide range of operating conditions. The brass material offers superior heat conductivity and flow consistency, while the precise dimensional specifications allow for seamless integration with MIKUNI carburetor systems. Riders will experience smoother power delivery, improved fuel efficiency, and enhanced throttle response, making these jets essential for competitive powersports applications.| SKU | GMB4547EAD |
|---|---|
| MPN | FBS30/96-52.5 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Keihin FCR Carbureted Models | CRF450R, YZ450F, KX450F, RMZ450 | 1985-2024 |
| Honda | CRF450R | 2000-2015 |
| Yamaha | YZ450F, WR450F | 2006-2020 |
Frequently Asked Questions
Designed for Mikuni TM40/HVM40 flat-slide carbs and as replacement needle jets in Keihin FCR carbs (PJ34-52.5 equivalent).
Use plug chop method or wideband O2 sensor. 52.5 is common for stock to lightly modded 450cc 4-strokes at sea level.
Yes, bleed pilot jets (FBS series) have an air bleed hole for better mid-range fueling in flat-slide carbs.
Only if you have Keihin FCR or Mikuni TM40/HVM. Check fitment tab.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Small flathead screwdriver
- Carb cleaning kit
- Jet gauge (optional)
Pro Tips
- Mark old jet size before removal. Clean ultrasonic if possible. Test plug chop after install to verify fueling
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Installing wrong size jet
Comparison vs Stock/OEM
Aftermarket precision-machined brass vs OEM stamped jets
Improvements
- More consistent flow rates
- Better mid-range tuning control
- Ideal for performance modifications
Considerations
- Requires rejetting knowledge; not plug-and-play for stock setups
Durability & Warranty
Expected Lifespan
Indefinite with proper carb maintenance (5+ years typical)
Warranty
Limited lifetime from Mikuni against manufacturing defects
Maintenance
Inspect during annual carb service; replace if clogged or damaged
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