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Start ShoppingMIKUNI F4/042-110 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 F4/042-110 Hex Main Jets. These precision-engineered brass jets deliver consistent airflow and optimal combustion for enhanced power and efficiency in high-performance two-stroke engines.
Key Features
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance in demanding riding conditions.
- #110 Jet Size: Precisely calibrated flow rate for balanced fuel-air mixture in modified or stock engines.
- Hex Head Thread: Easy-to-adjust design allows for quick tuning without specialized tools.
- M5 x 0.75 Thread: Standardized threading ensures seamless compatibility with MIKUNI carburetor systems.
- 6mm Hex Head: Ergonomic design simplifies installation and maintenance for riders of all skill levels.
Why Choose This Product
These jets offer unmatched reliability and precision for riders seeking to fine-tune their engine's performance. The brass material resists wear and maintains accuracy over time, while the hex head design provides effortless adjustment. Perfect for racing, off-road, or street use, these jets deliver consistent power output and improved throttle response. Whether you're modifying your engine or maintaining peak performance, MIKUNI's F4/042-110 jets provide the precision needed for professional-level results.
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Upgrade your engine's fuel delivery system with MIKUNI's F4/042-110 Hex Main Jets. These precision-engineered brass jets deliver consistent airflow and optimal combustion for enhanced power and efficiency in high-performance two-stroke engines.
Key Features
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance in demanding riding conditions.
- #110 Jet Size: Precisely calibrated flow rate for balanced fuel-air mixture in modified or stock engines.
- Hex Head Thread: Easy-to-adjust design allows for quick tuning without specialized tools.
- M5 x 0.75 Thread: Standardized threading ensures seamless compatibility with MIKUNI carburetor systems.
- 6mm Hex Head: Ergonomic design simplifies installation and maintenance for riders of all skill levels.
Why Choose This Product
These jets offer unmatched reliability and precision for riders seeking to fine-tune their engine's performance. The brass material resists wear and maintains accuracy over time, while the hex head design provides effortless adjustment. Perfect for racing, off-road, or street use, these jets deliver consistent power output and improved throttle response. Whether you're modifying your engine or maintaining peak performance, MIKUNI's F4/042-110 jets provide the precision needed for professional-level results.| SKU | GM0040DE79 |
|---|---|
| MPN | F4/042-110 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various (Mikuni VM/PF/BS carbureted bikes) | VM34/394/426/BS32/36/40 series carbs | 1985-2024 |
Frequently Asked Questions
Fits most Mikuni round-slide carbs like VM26-VM44, BS32-40, PF series. Check your carb model.
Use a jet kit or dyno tune. #110 is common for mid-range on 250-450cc bikes at sea level.
Yes, hex jets have a 6mm hex head for easier removal without special tools.
No, Mikuni jets are not interchangeable with Keihin due to thread differences.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- 12-point socket or wrench (6mm)
Pro Tips
- Count turns on old jet to match air/fuel screw position. Clean jet thoroughly before install.
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Incorrect jet size selection
Comparison vs Stock/OEM
Direct OEM replacement or upgrade; identical to factory Mikuni jets on many Japanese bikes
Improvements
- Precision machined for consistent flow
- Easier to service with hex head
Considerations
- None - matches OEM specs exactly
Durability & Warranty
Expected Lifespan
Indefinite with proper maintenance (does not wear out)
Warranty
Limited lifetime from Mikuni
Maintenance
Inspect/clean during carb service (every 20-50 hours)
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