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Start ShoppingMIKUNI FN102221-85 High Speed Jet - Precision Engine Tuning for Power & Performance
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Description
Elevate your engine's performance with the MIKUNI FN102221-85 High Speed Jet, engineered for riders who demand precision, power, and reliability. This advanced jet system optimizes fuel-air mixture ratios for maximum horsepower and smooth throttle response, making it ideal for high-speed applications.
Key Features
- High-Speed Calibration: Fine-tuned for peak performance at elevated RPMs, ensuring consistent power delivery across speed ranges.
- Durable Brass Construction: Corrosion-resistant materials withstand harsh conditions while maintaining precise flow control.
- Easy Adjustment: Quick-access screw design allows riders to fine-tune air-fuel ratios on the fly for optimal performance.
- Universal Compatibility: Designed to fit a wide range of 2-stroke engines, offering versatile installation options.
Why Choose This Product
Whether you're racing or riding aggressively, this jet system delivers unmatched responsiveness and efficiency. Its robust build ensures long-term reliability, while the adjustable design lets you customize performance to match your riding style. Perfect for enthusiasts looking to unlock their engine's full potential without compromising durability.
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Elevate your engine's performance with the MIKUNI FN102221-85 High Speed Jet, engineered for riders who demand precision, power, and reliability. This advanced jet system optimizes fuel-air mixture ratios for maximum horsepower and smooth throttle response, making it ideal for high-speed applications.
Key Features
- High-Speed Calibration: Fine-tuned for peak performance at elevated RPMs, ensuring consistent power delivery across speed ranges.
- Durable Brass Construction: Corrosion-resistant materials withstand harsh conditions while maintaining precise flow control.
- Easy Adjustment: Quick-access screw design allows riders to fine-tune air-fuel ratios on the fly for optimal performance.
- Universal Compatibility: Designed to fit a wide range of 2-stroke engines, offering versatile installation options.
Why Choose This Product
Whether you're racing or riding aggressively, this jet system delivers unmatched responsiveness and efficiency. Its robust build ensures long-term reliability, while the adjustable design lets you customize performance to match your riding style. Perfect for enthusiasts looking to unlock their engine's full potential without compromising durability.
| SKU | GMDF531460 |
|---|---|
| MPN | FN102221-85 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Yamaha | XT250, TT-R230, YZ85, PW80, and other models using Mikuni VM carburetors | 1980-2025 |
| Various Honda | CRF150R, XR100, TRX90 | 1990-2025 |
| Various Kawasaki | KLX110, KDX100 | 1985-2025 |
| Various Suzuki | DR-Z125, JR80 | 1975-2025 |
Frequently Asked Questions
Fits Mikuni VM-series carburetors (VM20, VM26, VM34, BS series) commonly found on Yamaha, Honda, Kawasaki, and Suzuki 2-stroke/4-stroke bikes.
Single jets are for fine-tuning specific circuits. Consider a full Mikuni jet kit for complete carb tuning.
Yes, #85 is larger than stock in many applications (e.g., #82-84), enriching the main circuit for high RPM.
Yes, OEM Mikuni part number FN102221-85, not aftermarket copy.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Small flathead screwdriver
- Carburetor rebuild kit (optional)
- Jet cleaner or carb cleaner
Pro Tips
- Remove carburetor float bowl completely. Clean jet thoroughly before swapping. Always rejet in pairs (pilot and main) and test ride to verify air/fuel mixture.
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Incorrect jet size selection leading to poor performance
Comparison vs Stock/OEM
Direct OEM replacement or upgrade for stock Mikuni carbs; identical to factory jets in many Japanese bikes
Improvements
- Precise fuel metering for optimal performance
- Consistent quality over generic jets
Considerations
- Larger size (#85) richer than stock in lean setups; dyno tune recommended
Durability & Warranty
Expected Lifespan
Indefinite with proper cleaning (metal jet, no wear parts)
Warranty
Limited lifetime (Mikuni standard for jets)
Maintenance
Clean with carb cleaner every service; inspect for clogging
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