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Start ShoppingMIKUNI FVM28/486-45 Bleed Pilot Jets - Precision Fuel Delivery for High-Performance Engines
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Description
Upgrade your carburetor's fuel delivery system with MIKUNI's precision-engineered bleed pilot jets. These critical components ensure accurate fuel-air mixture ratios, enhancing engine performance, responsiveness, and fuel efficiency for powersport vehicles.
Key Features
- Exact Fitment: Designed for MIKUNI FVM28/486-45 carburetors to ensure seamless compatibility and optimal performance.
- Precision Machining: High-tolerance manufacturing for consistent fuel flow and reliable engine operation under varying conditions.
- Durable Construction: Made from corrosion-resistant materials to withstand harsh environments and prolonged use.
- Easy Installation: Simple replacement process with minimal tools required for quick carburetor upgrades.
Why Choose This Product
These bleed pilot jets are essential for riders seeking to fine-tune their engine's fuel delivery. By maintaining the correct air-fuel ratio, they improve throttle response, reduce fuel waste, and extend engine life. Perfect for motorcycle, ATV, and UTV enthusiasts looking to maximize performance without compromising reliability. MIKUNI's reputation for quality ensures these jets deliver consistent results in high-stakes riding conditions.
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Upgrade your carburetor's fuel delivery system with MIKUNI's precision-engineered bleed pilot jets. These critical components ensure accurate fuel-air mixture ratios, enhancing engine performance, responsiveness, and fuel efficiency for powersport vehicles.
Key Features
- Exact Fitment: Designed for MIKUNI FVM28/486-45 carburetors to ensure seamless compatibility and optimal performance.
- Precision Machining: High-tolerance manufacturing for consistent fuel flow and reliable engine operation under varying conditions.
- Durable Construction: Made from corrosion-resistant materials to withstand harsh environments and prolonged use.
- Easy Installation: Simple replacement process with minimal tools required for quick carburetor upgrades.
Why Choose This Product
These bleed pilot jets are essential for riders seeking to fine-tune their engine's fuel delivery. By maintaining the correct air-fuel ratio, they improve throttle response, reduce fuel waste, and extend engine life. Perfect for motorcycle, ATV, and UTV enthusiasts looking to maximize performance without compromising reliability. MIKUNI's reputation for quality ensures these jets deliver consistent results in high-stakes riding conditions.
| SKU | GMC8CD2E56 |
|---|---|
| MPN | FVM28/486-45 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Suzuki | RM250, RMZ250, RM125, RMZ450 | 1980-2005 |
| Kawasaki | KX250, KX125 | 1990-2010 |
| Yamaha | YZ250, YZ125 | 1985-2000 |
| Honda | CR250, CRF250R | All Years |
Frequently Asked Questions
Fits Mikuni FVM28 flat slide carburetors, common in 2-stroke and 4-stroke MX bikes with aftermarket carbs.
Use plug chop method: Run bike at 1/4 throttle, check spark plug color. Lean = larger jet, rich = smaller.
Yes, bleed pilot jets have an air bleed hole for better low-speed response and easier tuning in flat slide carbs.
No, threading is Mikuni-specific. Use adapters or stock Keihin jets for PWK/VM carbs.
No, jets are bare brass. Reuse OEM washer or purchase separately if needed.
Installation Guide
Difficulty
Easy
Est. Time
10 min
Tools Required
- Small flathead screwdriver
- Jet cleaning wire or carb cleaner
- Optional: Jet gauge
Pro Tips
- Clean jet thoroughly before install. Test plug chop method to verify sizing. Buy assortment pack for tuning range.
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Incorrect jet size selection without testing
Comparison vs Stock/OEM
Aftermarket Mikuni replacement or upgrade over OEM Keihin pilots in many Japanese MX bikes
Improvements
- Better low-speed throttle response via bleed design
- Easier tuning for mods like exhaust/pipe changes
- Superior material quality for high-performance use
Considerations
- Requires re-jetting for optimal performance; not direct OEM swap
Durability & Warranty
Expected Lifespan
Indefinite with proper cleaning (carb service every 10-20 hours)
Warranty
Limited lifetime from Mikuni against defects
Maintenance
Remove and clean/ultrasonic during every carb rebuild. Inspect for wear/clogging.
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