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Start ShoppingMIKUNI F4/042-600 Hex Main Jets - Precision Brass Jets for High-Performance Engines
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Description
Upgrade your engine's fuel delivery system with MIKUNI's precision-machined F4/042-600 Hex Main Jets. These durable brass jets deliver consistent fuel flow for maximum power and responsiveness in high-performance motorcycles and off-road vehicles.
Key Features
- Brass Construction: Corrosion-resistant material ensures long-lasting performance in demanding riding conditions.
- #600 Jet Size: Optimized fuel flow rate for precise air-fuel mixture control in racing and modified engines.
- Hex Head Thread: 5/16-32 thread pattern ensures secure installation and compatibility with MIKUNI carburetor systems.
- Compact Design: 0.5" length and 0.375" hex width for easy handling and precise jet placement.
- Ultra-Lightweight: Under 1 gram weight minimizes impact on engine balance and performance.
Why Choose This Product
Engineers and racers rely on MIKUNI jets for their precision manufacturing and reliable performance. These jets offer superior flow consistency, enhanced throttle response, and improved fuel efficiency. The hex head design simplifies maintenance while maintaining a secure fit, making them ideal for both street and competition use. Whether you're tuning a sport bike or modifying an off-road rig, these jets deliver the accuracy needed to unlock your engine's full potential.
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Upgrade your engine's fuel delivery system with MIKUNI's precision-machined F4/042-600 Hex Main Jets. These durable brass jets deliver consistent fuel flow for maximum power and responsiveness in high-performance motorcycles and off-road vehicles.
Key Features
- Brass Construction: Corrosion-resistant material ensures long-lasting performance in demanding riding conditions.
- #600 Jet Size: Optimized fuel flow rate for precise air-fuel mixture control in racing and modified engines.
- Hex Head Thread: 5/16-32 thread pattern ensures secure installation and compatibility with MIKUNI carburetor systems.
- Compact Design: 0.5" length and 0.375" hex width for easy handling and precise jet placement.
- Ultra-Lightweight: Under 1 gram weight minimizes impact on engine balance and performance.
Why Choose This Product
Engineers and racers rely on MIKUNI jets for their precision manufacturing and reliable performance. These jets offer superior flow consistency, enhanced throttle response, and improved fuel efficiency. The hex head design simplifies maintenance while maintaining a secure fit, making them ideal for both street and competition use. Whether you're tuning a sport bike or modifying an off-road rig, these jets deliver the accuracy needed to unlock your engine's full potential.
| SKU | GME3B78601 |
|---|---|
| MPN | F4/042-600 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various | Carbureted motorcycles/ATVs with Mikuni VM/PF/BS carburetors | 1980-2025 |
Frequently Asked Questions
Fits most Mikuni round-slide carbs like VM26-VM44, BS30-40, PF series. Check your carb markings.
Base on stock jet + altitude/temp. #600 is large, for high altitude or rich setups. Use plug chop method to tune.
Yes, Mikuni is OEM supplier for many bikes. Identical to factory jets.
No, threading differs. Mikuni jets are specific to Mikuni carbs.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet cleaning wire or compressed air
Pro Tips
- Remove carb, unscrew old jet with screwdriver, insert new one finger tight then snug. Always rejet in sets (pilot, main, needle) for best results. Test plug reads to verify.
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Incorrect jet size for altitude/temp causing lean/rich conditions
Comparison vs Stock/OEM
Direct OEM equivalent as Mikuni supplies most factory carbs
Improvements
- Precision machined for consistent flow
- Hex head for easy tool-free removal
Considerations
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Durability & Warranty
Expected Lifespan
Indefinite with proper cleaning; lasts full carb life
Warranty
Limited lifetime from Mikuni against defects
Maintenance
Clean with spray carb cleaner every 10-20 hours; inspect for debris
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