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Start ShoppingMIKUNI FVM28/486-20 Bleed Pilot Jets - Brass Jets for Lean Mid-Range Fueling
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Description
Upgrade your engine's fuel delivery system with these MIKUNI FVM28/486-20 Bleed Pilot Jets. Engineered for precision tuning, these brass jets deliver consistent airflow and fuel mixture for enhanced power and efficiency in racing and off-road applications.
Key Features
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance in harsh environments.
- Clip Height 4.86mm: Precise dimensional control for accurate fuel metering and easy installation.
- Bleed Hole Configuration #20: Optimized air bleed design for leaner mid-range fueling and smoother throttle response.
- Lightweight Design: Just 0.1 oz (3g) for minimal impact on engine balance and responsiveness.
Why Choose This Product
These MIKUNI jets are essential for riders seeking fine-tuned fuel delivery in high-performance engines. The brass material resists wear and maintains accuracy under extreme conditions, while the #20 bleed hole configuration ensures optimal air-fuel ratios for power and fuel efficiency. Perfect for racing, motocross, and off-road applications where precision matters.
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Upgrade your engine's fuel delivery system with these MIKUNI FVM28/486-20 Bleed Pilot Jets. Engineered for precision tuning, these brass jets deliver consistent airflow and fuel mixture for enhanced power and efficiency in racing and off-road applications.
Key Features
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance in harsh environments.
- Clip Height 4.86mm: Precise dimensional control for accurate fuel metering and easy installation.
- Bleed Hole Configuration #20: Optimized air bleed design for leaner mid-range fueling and smoother throttle response.
- Lightweight Design: Just 0.1 oz (3g) for minimal impact on engine balance and responsiveness.
Why Choose This Product
These MIKUNI jets are essential for riders seeking fine-tuned fuel delivery in high-performance engines. The brass material resists wear and maintains accuracy under extreme conditions, while the #20 bleed hole configuration ensures optimal air-fuel ratios for power and fuel efficiency. Perfect for racing, motocross, and off-road applications where precision matters.
| SKU | GMD16AF6B7 |
|---|---|
| MPN | FVM28/486-20 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Yamaha | YZ450F | 2009-2019 |
| KTM | 450 SX-F | 2010-2020 |
| Honda | CRF450R | 2008-2018 |
| Kawasaki | KX450F | 2012-2022 |
Frequently Asked Questions
FVM28 refers to the pilot jet series, 486 is the clip height in tenths of mm (4.86mm), and -20 indicates the bleed hole size.
Bleed pilot jets like this are typically used to lean out the mixture by allowing more air, equivalent to a smaller standard pilot jet.
Often yes, especially if changing altitude or making other carb mods. Consult a jetting chart for your setup.
No, this is specifically for Mikuni carbs like TM or FCR series. Check your carb model.
Installation Guide
Difficulty
Easy
Est. Time
10 min
Tools Required
- Small flathead screwdriver
- Jet removal tool or needle nose pliers
Pro Tips
- Mark your stock jet size before removal
- Test plug chop after install to verify fueling
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Incorrect jet sizing without testing
Comparison vs Stock/OEM
Aftermarket Mikuni bleed pilots offer more precise tuning options than OEM fixed pilots
Improvements
- Finer adjustment for altitude and temperature changes
- Better mid-range throttle response
- Easier to clean than emulsion tube designs
Considerations
- Requires jetting knowledge
- dyno tuning recommended for optimal results
Durability & Warranty
Expected Lifespan
Indefinite with proper maintenance (carb cleaning)
Warranty
Limited lifetime against manufacturing defects
Maintenance
Clean during annual carb service, inspect for wear or clogging
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