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Start ShoppingMikuni FN102221-157.5 High Speed Jet - Precision Fuel Delivery for Powerboating Enthusiasts
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Description
Upgrade your powerboat's fuel system with Mikuni's High Speed Jet, designed to deliver unmatched performance and reliability for speed enthusiasts. This precision-engineered jet ensures optimal fuel flow for maximum power and efficiency.
Key Features
- High-Flow Design: Optimized fuel delivery for high-speed performance and consistent power output.
- Durable Construction: Built with corrosion-resistant materials for long-lasting operation in harsh marine environments.
- Easy Maintenance: Simple adjustment and cleaning processes to keep your engine running smoothly.
- Compatibility: Designed to fit standard Mikuni carburetor systems for seamless integration.
- Precision Control: Fine-tuned fuel metering for responsive throttle control and improved fuel efficiency.
Why Choose This Product
Whether you're racing or cruising, Mikuni's High Speed Jet offers reliable performance with advanced fuel management technology. Its robust construction withstands extreme conditions, while intuitive design makes maintenance straightforward. Upgrade to this high-performance jet for smoother acceleration, better fuel economy, and enhanced overall engine efficiency.
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Upgrade your powerboat's fuel system with Mikuni's High Speed Jet, designed to deliver unmatched performance and reliability for speed enthusiasts. This precision-engineered jet ensures optimal fuel flow for maximum power and efficiency.
Key Features
- High-Flow Design: Optimized fuel delivery for high-speed performance and consistent power output.
- Durable Construction: Built with corrosion-resistant materials for long-lasting operation in harsh marine environments.
- Easy Maintenance: Simple adjustment and cleaning processes to keep your engine running smoothly.
- Compatibility: Designed to fit standard Mikuni carburetor systems for seamless integration.
- Precision Control: Fine-tuned fuel metering for responsive throttle control and improved fuel efficiency.
Why Choose This Product
Whether you're racing or cruising, Mikuni's High Speed Jet offers reliable performance with advanced fuel management technology. Its robust construction withstands extreme conditions, while intuitive design makes maintenance straightforward. Upgrade to this high-performance jet for smoother acceleration, better fuel economy, and enhanced overall engine efficiency.
| SKU | GM9BC93DE7 |
|---|---|
| MPN | FN102221-157.5 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Yamaha | XT250, TTR125, YZ125/250, WR250 | 1980-2025 |
| Various Honda | CRF150R, XR250R, CRF230 | 1990-2025 |
| Various Kawasaki | KLX250, KX125/250 | 1985-2025 |
| Various Suzuki | DR-Z400, RM125/250 | 1995-2025 |
Frequently Asked Questions
The high-speed (main) jet controls fuel flow when the throttle is open and the engine is running at higher RPMs. It's critical for mid-range and full-throttle performance.
Jet size depends on your carburetor model, altitude, temperature, and engine modifications. Check your carburetor manual or consult with a tuning specialist. Common sizes range from 120-180.
No. Different Mikuni carburetor models (VM, TMX, TM, etc.) use different jet sizes and styles. Verify your carburetor model first.
Jets rarely need replacement unless damaged. They typically last the life of the carburetor. Replace if you notice clogging or performance issues.
Low-speed jets control fuel at idle and low throttle positions. High-speed jets control fuel at higher throttle openings and RPMs. Both work together for proper tuning.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Screwdriver (Phillips or flat head depending on carburetor)
- Small wrench or socket set
- Gasket scraper or plastic tool
Pro Tips
- Keep track of old jet size for reference
- Clean carburetor passages while bowl is off
- Use new gaskets when reassembling
- Test run and adjust if needed - jetting affects performance significantly
Common Mistakes to Avoid
- Over-tightening the jet (can damage brass)
- Not replacing gasket when reassembling
- Failing to verify correct jet size for application
- Not cleaning carburetor before reassembly
Comparison vs Stock/OEM
Allows fine-tuning of fuel delivery compared to fixed OEM jets
Improvements
- Customizable jetting for performance optimization
- Ability to adjust for altitude and temperature changes
- Support for engine modifications
- Better throttle response when properly tuned
Considerations
- Requires carburetor knowledge to select correct size
- Improper jetting can reduce performance or damage engine
- May need multiple jets to find optimal tuning
Durability & Warranty
Expected Lifespan
Indefinite if not damaged; typically lasts life of carburetor
Warranty
Typically covered under Mikuni's standard warranty (verify with retailer)
Maintenance
No maintenance required; inspect for clogging if carburetor is not running properly
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