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Start ShoppingMikuni FN102221-177.5 High Speed Jet - Precision Fuel Delivery for Power Sports Enthusiasts
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Description
Upgrade your power sports engine's performance with the Mikuni FN102221-177.5 High Speed Jet. Engineered for precision fuel delivery, this jet optimizes combustion efficiency to deliver maximum power and reliability across a range of high-performance applications.
Key Features
- Precision Fuel Metering: Advanced orifice design ensures consistent fuel flow for balanced engine performance.
- Durable Construction: High-grade brass alloy resists corrosion and maintains accuracy in extreme operating conditions.
- Adjustable Orifice: Fine-tune fuel delivery for specific engine tuning needs and altitude variations.
- Universal Compatibility: Designed to fit most Mikuni carburetor systems for easy installation.
Why Choose This Product
Whether you're modifying a dirt bike, ATV, or off-road vehicle, this jet delivers reliable performance with its precision engineering. The adjustable orifice allows for customization to match your engine's requirements, while the durable construction ensures long-term use without degradation. Perfect for riders seeking enhanced power output and consistent fuel efficiency in demanding environments.
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Upgrade your power sports engine's performance with the Mikuni FN102221-177.5 High Speed Jet. Engineered for precision fuel delivery, this jet optimizes combustion efficiency to deliver maximum power and reliability across a range of high-performance applications.
Key Features
- Precision Fuel Metering: Advanced orifice design ensures consistent fuel flow for balanced engine performance.
- Durable Construction: High-grade brass alloy resists corrosion and maintains accuracy in extreme operating conditions.
- Adjustable Orifice: Fine-tune fuel delivery for specific engine tuning needs and altitude variations.
- Universal Compatibility: Designed to fit most Mikuni carburetor systems for easy installation.
Why Choose This Product
Whether you're modifying a dirt bike, ATV, or off-road vehicle, this jet delivers reliable performance with its precision engineering. The adjustable orifice allows for customization to match your engine's requirements, while the durable construction ensures long-term use without degradation. Perfect for riders seeking enhanced power output and consistent fuel efficiency in demanding environments.| SKU | GM9E8B74B5 |
|---|---|
| MPN | FN102221-177.5 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Honda | CRF450R | 2008-2014 |
| Kawasaki | KX450F | 2010-2015 |
| Yamaha | YZ450F | 2009-2016 |
| KTM | 450 SX-F | 2012-2020 |
Frequently Asked Questions
Fits Mikuni TM series, BS series, and many Keihin FCR carbs on 4-stroke dirt bikes like Honda CRF, Yamaha YZ/KTM SX models.
Depends on model; typically used for higher elevations or richer mid-high fueling. Compare to your stock main jet size (often 165-175).
Single jet for fine-tuning. Recommend full jet kit for complete rejetting.
Optimizes air/fuel ratio for your conditions, improving power and throttle response when properly sized.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet wrench or needle nose pliers
Pro Tips
- Remove carb bowl completely for better access. Clean all jets and passages with carb cleaner. Always rejet in sets for balanced fueling.
Common Mistakes to Avoid
- Dropping the tiny jet into the carb body
- Not cleaning the needle jet orifice before installation
Comparison vs Stock/OEM
Direct replacement for OEM main jets in Mikuni-equipped bikes; genuine Mikuni part often matches or exceeds OEM quality
Improvements
- Precise fuel metering for performance tuning
- Consistent brass material for durability
Considerations
- Sizing must match your setup; not a direct 'upgrade' without tuning
Durability & Warranty
Expected Lifespan
Entire carb life with proper maintenance; thousands of hours
Warranty
Limited lifetime by Mikuni against defects
Maintenance
Inspect/clean during carb service (every 10-20 hours off-road)
What Others Are Saying
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