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Start ShoppingMIKUNI FN224103-45 Bleed Pilot Jets - High-Performance Carburetor Components
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Description
Upgrade your powersports engine's fuel delivery system with authentic MIKUNI bleed pilot jets. These critical components ensure precise air-fuel mixture control, delivering smoother throttle response and improved power output for motorcycles, ATVs, and more.
Key Features
- Exact OEM Specifications: Precision-machined to match original equipment standards for seamless integration with MIKUNI carburetor systems.
- Enhanced Fuel Flow Control: Optimized orifice sizing ensures consistent fuel delivery across varying engine speeds and load conditions.
- Durable Stainless Steel Construction: Corrosion-resistant material withstands harsh environments while maintaining precise flow characteristics.
Why Choose This Product
Whether you're tuning a high-performance engine or restoring a classic ride, these bleed pilot jets offer reliable fuel metering that enhances engine efficiency. The universal fitment simplifies installation, while the durable design reduces maintenance needs. Riders benefit from improved throttle response, better fuel economy, and consistent power delivery across RPM ranges. Perfect for mechanics and enthusiasts seeking precise carburetor tuning solutions.
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Upgrade your powersports engine's fuel delivery system with authentic MIKUNI bleed pilot jets. These critical components ensure precise air-fuel mixture control, delivering smoother throttle response and improved power output for motorcycles, ATVs, and more.
Key Features
- Exact OEM Specifications: Precision-machined to match original equipment standards for seamless integration with MIKUNI carburetor systems.
- Enhanced Fuel Flow Control: Optimized orifice sizing ensures consistent fuel delivery across varying engine speeds and load conditions.
- Durable Stainless Steel Construction: Corrosion-resistant material withstands harsh environments while maintaining precise flow characteristics.
Why Choose This Product
Whether you're tuning a high-performance engine or restoring a classic ride, these bleed pilot jets offer reliable fuel metering that enhances engine efficiency. The universal fitment simplifies installation, while the durable design reduces maintenance needs. Riders benefit from improved throttle response, better fuel economy, and consistent power delivery across RPM ranges. Perfect for mechanics and enthusiasts seeking precise carburetor tuning solutions.
| SKU | GMD4BCE45B |
|---|---|
| MPN | FN224103-45 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | Carbureted motorcycles/ATVs (Keihin/Mikuni carbs) | 1980-2025 |
| Honda | XR series, CRF250R, CRF450R | 1990-2010 |
| Yamaha | PW series, YZ, WR | 1985-2015 |
| Suzuki | RM, DRZ, LT series ATVs | 1980-2020 |
Frequently Asked Questions
Fits Mikuni VM, PJ, TM series and compatible Keihin carbs using pilot jets. Confirm your carb model and stock jet size.
Use a jetting kit or app based on altitude, temperature, mods (exhaust/air filter). #45 is common stock size for many mid-range bikes.
Yes, bleed pilot jets have an air bleed hole for better low-speed fueling and easier tuning.
Yes, many Keihin carbs use identical Mikuni-spec pilot jets; check thread and size.
Carb tuning is standard maintenance; no impact on vehicle warranty.
Installation Guide
Difficulty
Easy
Est. Time
10 min
Tools Required
- Small flathead screwdriver
- Jeweler's screwdriver
- Flashlight
- Carb cleaner
Pro Tips
- Remove carburetor fully for best access. Clean jet orifice with compressed air. Always test idle mixture after install with tachometer.
Common Mistakes to Avoid
- Cross-threading the jet
- Not cleaning carb passages before install
- Incorrect jet size for altitude/temp
Comparison vs Stock/OEM
Direct OEM replacement or upgrade; bleed design improves idle/emission control over non-bleed pilots
Improvements
- Better cold start
- Smoother idle
- Easier tuning
- Improved fuel atomization
Considerations
- Requires re-tuning air/fuel screw
Durability & Warranty
Expected Lifespan
Entire carburetor life (50,000+ miles) if not damaged
Warranty
Limited lifetime (Mikuni OEM parts)
Maintenance
Inspect/clean during carb service (every 20-50 hours)
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