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Start ShoppingMIKUNI F4/042-470 Hex Main Jets - Precision Fuel Control for High-Performance Powersports Engines
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Description
Upgrade your powersports engine's fuel delivery system with MIKUNI's F4/042-470 Hex Main Jets. These precision-engineered components ensure optimal fuel-air mixture for enhanced power, efficiency, and engine longevity in high-performance applications.
Key Features
- Hexagonal Jet Design: Ensures secure, leak-free installation in MIKUNI carburetor systems
- High-Durability Construction: Precision-machined for resistance to fuel corrosion and extreme operating conditions
- Performance-Optimized Flow: Engineered for precise fuel metering across a wide range of RPMs
- Easy Installation: Standard hex fitting compatibility simplifies maintenance and tuning
- Adjustable Fuel Control: Fine-tune air-fuel ratios for custom performance tuning
Why Choose This Product
MIKUNI's F4/042-470 Hex Main Jets deliver unmatched reliability and performance for powersports enthusiasts. These jets provide consistent fuel delivery across varying throttle positions, ensuring peak engine performance while protecting against fuel starvation. The durable construction withstands high temperatures and corrosive fuel environments, reducing maintenance needs. Whether you're modifying a motorcycle, ATV, or UTV, these jets offer precise control for improved horsepower, fuel efficiency, and engine responsiveness. Perfect for racers and performance tuners seeking factory-level fuel delivery precision.
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Upgrade your powersports engine's fuel delivery system with MIKUNI's F4/042-470 Hex Main Jets. These precision-engineered components ensure optimal fuel-air mixture for enhanced power, efficiency, and engine longevity in high-performance applications.
Key Features
- Hexagonal Jet Design: Ensures secure, leak-free installation in MIKUNI carburetor systems
- High-Durability Construction: Precision-machined for resistance to fuel corrosion and extreme operating conditions
- Performance-Optimized Flow: Engineered for precise fuel metering across a wide range of RPMs
- Easy Installation: Standard hex fitting compatibility simplifies maintenance and tuning
- Adjustable Fuel Control: Fine-tune air-fuel ratios for custom performance tuning
Why Choose This Product
MIKUNI's F4/042-470 Hex Main Jets deliver unmatched reliability and performance for powersports enthusiasts. These jets provide consistent fuel delivery across varying throttle positions, ensuring peak engine performance while protecting against fuel starvation. The durable construction withstands high temperatures and corrosive fuel environments, reducing maintenance needs. Whether you're modifying a motorcycle, ATV, or UTV, these jets offer precise control for improved horsepower, fuel efficiency, and engine responsiveness. Perfect for racers and performance tuners seeking factory-level fuel delivery precision.| SKU | GM1FEB4BCF |
|---|---|
| MPN | F4/042-470 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various (Yamaha, Suzuki, Kawasaki, Honda) | Carbureted motorcycles/ATVs with Mikuni VM or BS carburetors | 1980-2025 |
Frequently Asked Questions
Jet sizes indicate the orifice diameter in millimeters × 100. A #470 jet has an orifice of approximately 0.47mm. Larger numbers = richer fuel mixture, smaller numbers = leaner mixture.
Jet selection depends on your carburetor model, engine displacement, altitude, and desired performance. Consult your carburetor manual, engine manual, or contact Mikuni technical support with your specific setup details.
No. Different Mikuni carburetors use different jet sizes and styles. Verify your carburetor model accepts #470 main jets before purchasing. Check your carburetor documentation.
Hex head jets have a hexagonal head for easier installation/removal with a wrench or socket. Non-hex jets typically require a screwdriver. The hex design is more convenient for frequent adjustments.
Depends on your setup. Some carburetors allow main jet access without full removal. Others require carburetor removal. Check your specific engine/carburetor manual for access procedures.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Hex wrench or socket (size depends on jet head)
- Small screwdriver (potentially, for carburetor access)
- Clean workspace
Pro Tips
- Clean the jet passage with carburetor cleaner before installing new jet
- Use gentle pressure when tightening - brass is soft and can strip
- Keep jets organized by size if you have multiple jets for tuning
- Take a photo of your carburetor setup before disassembly for reference
Common Mistakes to Avoid
- Over-tightening the jet, which can damage the brass
- Installing wrong jet size for your carburetor
- Not cleaning the jet passage before installation
- Forgetting to drain carburetor before removal
Durability & Warranty
Expected Lifespan
Indefinite if properly maintained; brass jets don't wear out under normal use
Warranty
Typically covered under standard Mikuni parts warranty (verify with retailer)
Maintenance
Clean periodically with carburetor cleaner; inspect for debris or damage
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