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Start ShoppingMikuni FN102221-90 High Speed Jet - Precision Performance Jet for Powersports Enthusiasts
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Description
Elevate your powersports performance with the Mikuni FN102221-90 High Speed Jet, engineered for precision fuel delivery and maximum power output. This specialized jet ensures optimal engine efficiency while maintaining reliability under extreme conditions.
Key Features
- High-Speed Fuel Optimization: Advanced design for enhanced throttle response and consistent power delivery at high RPMs.
- Durable Construction: Precision-machined brass components withstand harsh environments and prolonged use.
- Universal Compatibility: Fits most 2-stroke and 4-stroke engines for easy installation across various powersports equipment.
- Easy Adjustment: Simple calibration allows riders to fine-tune performance for different riding conditions.
- Corrosion Resistance: Special coating protects against fuel and environmental degradation.
Why Choose This Product
Whether you're tackling off-road trails or high-speed racing, this Mikuni jet delivers unmatched performance with its balanced fuel-air mixture. The durable build ensures long-term reliability, while the straightforward installation makes it a must-have for serious riders. Its versatility across engine types makes it an essential upgrade for anyone seeking peak power and efficiency.
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Elevate your powersports performance with the Mikuni FN102221-90 High Speed Jet, engineered for precision fuel delivery and maximum power output. This specialized jet ensures optimal engine efficiency while maintaining reliability under extreme conditions.
Key Features
- High-Speed Fuel Optimization: Advanced design for enhanced throttle response and consistent power delivery at high RPMs.
- Durable Construction: Precision-machined brass components withstand harsh environments and prolonged use.
- Universal Compatibility: Fits most 2-stroke and 4-stroke engines for easy installation across various powersports equipment.
- Easy Adjustment: Simple calibration allows riders to fine-tune performance for different riding conditions.
- Corrosion Resistance: Special coating protects against fuel and environmental degradation.
Why Choose This Product
Whether you're tackling off-road trails or high-speed racing, this Mikuni jet delivers unmatched performance with its balanced fuel-air mixture. The durable build ensures long-term reliability, while the straightforward installation makes it a must-have for serious riders. Its versatility across engine types makes it an essential upgrade for anyone seeking peak power and efficiency.
| SKU | GM21A34D5A |
|---|---|
| MPN | FN102221-90 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Yamaha | XT250, WR250, YZ250, TTR125 (select models) | 1980-2025 |
| Various Kawasaki | KLX250, KX250, Ninja 250 | 1990-2025 |
| Various Suzuki | DR-Z400, RM250, DR250 | 1985-2025 |
| Various Honda | XR250R, CRF250R | 1995-2025 |
Frequently Asked Questions
Fits Mikuni BS34, BS36, VM34/VM36 round-slide carbs on Yamaha/Kawasaki/Suzuki models. Verify by measuring stock jet.
This is a high-speed (main) jet for primary circuit above 1/4 throttle.
Yes, #220 is larger than stock #170-210 in many bikes; use for altitude or mods like exhaust/air filter.
Often yes - pair with needle/pilot changes for full tune.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet wrench or needle-nose pliers
Pro Tips
- Remove carburetor float bowl completely. Clean o-ring groove. Test jet flow with carb cleaner spray.
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Installing wrong jet size without re-jetting map
Comparison vs Stock/OEM
Direct OEM-spec replacement or upgrade from smaller stock jets (typically #170-210)
Improvements
- Increased fuel flow for richer mixture
- Better performance at WOT/high RPM
- Ideal for mods/exhaust/altitude
Considerations
- Requires tuning to avoid rich bog or fouling plugs
Durability & Warranty
Expected Lifespan
Indefinite with proper maintenance (carb rebuild every 50-100 hours)
Warranty
Limited lifetime from Mikuni against defects
Maintenance
Inspect during carb cleans; replace if eroded
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