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Start ShoppingMIKUNI F4/042-480 Hex Main Jets - Precision Brass Main Jet for Carburetors
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Description
Upgrade your carburetor's fuel delivery system with MIKUNI's F4/042-480 Hex Main Jets. These precision-engineered brass jets deliver consistent fuel metering for optimal engine performance, whether you're racing or riding recreationally. Perfect for fine-tuning air-fuel ratios and maximizing power output.
Key Features
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance in harsh environments.
- Hex Head Design: Easy installation and precise adjustment for hassle-free carburetor tuning.
- 0.130" Orifice: Size 480 equivalent provides accurate fuel flow for balanced engine operation.
- M5 x 0.75 Thread: Universal compatibility with most carburetor systems for seamless integration.
- Flow Rate 480: Calibrated for precise main jet metering to enhance throttle response and power delivery.
Why Choose This Product
MIKUNI's F4/042-480 Hex Main Jets offer unmatched reliability and performance for riders seeking precision control. The brass material resists clogging and maintains consistent flow under varying conditions, while the hex head design simplifies adjustments during maintenance. Whether you're modifying a high-performance engine or optimizing a stock setup, these jets ensure accurate fuel delivery for smoother acceleration, better fuel efficiency, and enhanced engine longevity. Trust MIKUNI's reputation for quality to deliver consistent results every time you ride.
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Upgrade your carburetor's fuel delivery system with MIKUNI's F4/042-480 Hex Main Jets. These precision-engineered brass jets deliver consistent fuel metering for optimal engine performance, whether you're racing or riding recreationally. Perfect for fine-tuning air-fuel ratios and maximizing power output.
Key Features
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance in harsh environments.
- Hex Head Design: Easy installation and precise adjustment for hassle-free carburetor tuning.
- 0.130" Orifice: Size 480 equivalent provides accurate fuel flow for balanced engine operation.
- M5 x 0.75 Thread: Universal compatibility with most carburetor systems for seamless integration.
- Flow Rate 480: Calibrated for precise main jet metering to enhance throttle response and power delivery.
Why Choose This Product
MIKUNI's F4/042-480 Hex Main Jets offer unmatched reliability and performance for riders seeking precision control. The brass material resists clogging and maintains consistent flow under varying conditions, while the hex head design simplifies adjustments during maintenance. Whether you're modifying a high-performance engine or optimizing a stock setup, these jets ensure accurate fuel delivery for smoother acceleration, better fuel efficiency, and enhanced engine longevity. Trust MIKUNI's reputation for quality to deliver consistent results every time you ride.| SKU | GM4EE87C7C |
|---|---|
| MPN | F4/042-480 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | Carbureted motorcycles/ATVs (Keihin/Mikuni carbs) | 1980-2025 |
| Yamaha | YFM350X Warrior, Banshee | 1990-2010 |
| Honda | TRX350 FourTrax | 1985-2005 |
Frequently Asked Questions
Fits Mikuni VM, BS, TM round-slide carbs and many Keihin equivalents with M5 threading. Check your carb model.
Larger than stock in most applications (e.g., bigger than #130-150); use for richer mixtures or larger engines.
Sold individually; buy multiples for main, pilot, and needle tuning.
No, carbureted only.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet cleaning needle or wire
Pro Tips
- Remove float bowl, note old jet size, clean thoroughly, use jet gauge to verify flow
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Installing wrong size jet
Comparison vs Stock/OEM
Aftermarket precision-machined brass vs. often stamped OEM jets
Improvements
- More consistent fuel flow
- Better durability
- Easier tuning with hex head
Considerations
- Must match size to OEM or tuned needs
Durability & Warranty
Expected Lifespan
Indefinite with proper cleaning (5+ years typical)
Warranty
Limited manufacturer warranty against defects
Maintenance
Clean with carb cleaner every 10-20 hours; inspect for wear/clogging
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