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Start ShoppingMIKUNI F4/042-560 Hex Main Jets - Precision Fuel Delivery for High-Performance Engines
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Description
Upgrade your engine's fuel delivery system with MIKUNI's precision-engineered F4/042-560 Hex Main Jets. These critical components ensure optimal fuel-air mixture ratios for enhanced power, efficiency, and responsiveness in high-performance powersports engines.
Key Features
- Hexagonal Design: Ensures secure, leak-free installation and precise fuel flow control
- High-Durability Alloy: Resists corrosion and maintains accuracy under extreme operating conditions
- Exact Fitment: Specifically engineered for MIKUNI carburetor systems with 042-560 specifications
- Easy Installation: Streamlined design for quick replacement without compromising performance
Why Choose This Product
MIKUNI main jets deliver unmatched reliability and performance for riders demanding precision tuning. Their advanced manufacturing process ensures consistent fuel flow rates, while the hexagonal configuration provides superior sealing properties. Whether you're modifying a racing engine or fine-tuning a street machine, these jets offer the accuracy needed to maximize horsepower and fuel efficiency without sacrificing engine longevity.
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Upgrade your engine's fuel delivery system with MIKUNI's precision-engineered F4/042-560 Hex Main Jets. These critical components ensure optimal fuel-air mixture ratios for enhanced power, efficiency, and responsiveness in high-performance powersports engines.
Key Features
- Hexagonal Design: Ensures secure, leak-free installation and precise fuel flow control
- High-Durability Alloy: Resists corrosion and maintains accuracy under extreme operating conditions
- Exact Fitment: Specifically engineered for MIKUNI carburetor systems with 042-560 specifications
- Easy Installation: Streamlined design for quick replacement without compromising performance
Why Choose This Product
MIKUNI main jets deliver unmatched reliability and performance for riders demanding precision tuning. Their advanced manufacturing process ensures consistent fuel flow rates, while the hexagonal configuration provides superior sealing properties. Whether you're modifying a racing engine or fine-tuning a street machine, these jets offer the accuracy needed to maximize horsepower and fuel efficiency without sacrificing engine longevity.
| SKU | GM1013D719 |
|---|---|
| MPN | F4/042-560 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | Carbureted motorcycles/ATVs (e.g., Yamaha YZ, Honda XR, Kawasaki KX) | 1980-2025 |
| Suzuki | RM/DR-Z series | 1990-2010 |
Frequently Asked Questions
Fits Mikuni VM, PF, BS, and HSR series carbs with #560 main jet size.
Use a jet kit or dyno tune; #560 is typically for high altitude or rich modifications.
Yes, OEM Mikuni part F4/042-560.
No, Mikuni jets have different threading; stick to Mikuni carbs.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet wrench or needle nose pliers
Pro Tips
- Remove float bowl fully, note original jet size, clean with carb cleaner
Common Mistakes to Avoid
- Installing wrong jet size
- Not cleaning carb passages before install
Comparison vs Stock/OEM
Direct OEM replacement or upgrade for stock Mikuni jets
Improvements
- Precision machined for consistent fuel flow
- Durable brass construction
- Ideal for rejetting after mods
Considerations
- Requires carb tuning for optimal performance
Durability & Warranty
Expected Lifespan
Indefinite with proper fuel quality
Warranty
Manufacturer defect warranty (contact retailer)
Maintenance
Inspect for corrosion or debris during carb service
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