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Start ShoppingMIKUNI FJ8-6DP04 Jet Needle - Precision Fuel Delivery for Carburetors
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Description
Upgrade your powersports engine's fuel delivery system with the MIKUNI FJ8-6DP04 Jet Needle. This precision-engineered component ensures optimal fuel-air mixture control, delivering enhanced performance, smoother throttle response, and improved fuel efficiency for a wide range of carbureted engines.
Key Features
- Exact Fitment: Designed for seamless compatibility with MIKUNI carburetor systems, ensuring proper fuel metering without modifications.
- Precision Engineering: CNC-machined for consistent fuel flow accuracy, reducing engine hesitation and improving overall drivability.
- Durable Construction: High-grade brass alloy resists corrosion and wear, ensuring long-lasting performance in harsh riding conditions.
- Easy Installation: Simple replacement process with standard tools, minimizing downtime for mechanics and riders.
Why Choose This Product
Whether you're tuning a motorcycle, ATV, or UTV, the FJ8-6DP04 jet needle offers reliable fuel delivery that enhances engine efficiency and power output. Its precise calibration ensures optimal combustion, while the durable materials withstand high temperatures and fuel exposure. This essential carburetor component is perfect for riders seeking to fine-tune their engine's performance without compromising reliability.
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Upgrade your powersports engine's fuel delivery system with the MIKUNI FJ8-6DP04 Jet Needle. This precision-engineered component ensures optimal fuel-air mixture control, delivering enhanced performance, smoother throttle response, and improved fuel efficiency for a wide range of carbureted engines.
Key Features
- Exact Fitment: Designed for seamless compatibility with MIKUNI carburetor systems, ensuring proper fuel metering without modifications.
- Precision Engineering: CNC-machined for consistent fuel flow accuracy, reducing engine hesitation and improving overall drivability.
- Durable Construction: High-grade brass alloy resists corrosion and wear, ensuring long-lasting performance in harsh riding conditions.
- Easy Installation: Simple replacement process with standard tools, minimizing downtime for mechanics and riders.
Why Choose This Product
Whether you're tuning a motorcycle, ATV, or UTV, the FJ8-6DP04 jet needle offers reliable fuel delivery that enhances engine efficiency and power output. Its precise calibration ensures optimal combustion, while the durable materials withstand high temperatures and fuel exposure. This essential carburetor component is perfect for riders seeking to fine-tune their engine's performance without compromising reliability.| SKU | GM681FE2FA |
|---|---|
| MPN | FJ8-6DP04 |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Frequently Asked Questions
The jet needle controls fuel flow in the mid-range throttle position (approximately 1/4 to 3/4 throttle). It tapers into the needle jet, metering fuel based on throttle position and needle position.
Signs include rough mid-range throttle response, hesitation during acceleration, or if the needle is visibly worn, bent, or has a damaged taper.
Yes, most Mikuni carburetors allow needle clip adjustment (typically 5-6 positions). Moving the clip up leans the mixture; moving it down richens it.
No. The FJ8-6DP04 is specific to certain Mikuni carburetor models. Verify your carburetor model number before purchasing.
Not necessarily. If you're replacing a worn needle with an identical part, no rejetting is needed. However, if changing needle types for performance tuning, you may need to adjust the clip position or main jet.
Installation Guide
Difficulty
Medium
Est. Time
45 min
Tools Required
- Carburetor removal tools
- Small screwdrivers (Phillips and flat-head)
- Needle-nose pliers
- Carburetor cleaning supplies
- Gasket scraper
Pro Tips
- Take detailed photos during disassembly for reference
- Keep all small parts organized in a container
- Clean the carburetor thoroughly before installing new needle
- Verify needle clip position matches your jetting requirements
- Test idle and throttle response after installation
Common Mistakes to Avoid
- Not properly cleaning the carburetor before reassembly
- Losing small springs or clips during disassembly
- Incorrect needle positioning/clip placement
- Over-tightening needle retaining components
Durability & Warranty
Expected Lifespan
5-10 years typical, depending on fuel quality and carburetor maintenance
Warranty
Typically covered under OEM warranty if purchased from authorized Mikuni dealers
Maintenance
Keep carburetor clean; avoid ethanol fuel when possible to prevent needle wear
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