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Start ShoppingMIKUNI F4/042-180 Hex Main Jets - High-Performance Fuel Jet for Powersports Engines
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Description
Upgrade your powersports engine's fuel delivery system with MIKUNI's F4/042-180 Hex Main Jets. These high-performance jets ensure precise fuel metering for enhanced throttle response, consistent power delivery, and reliable operation in demanding off-road and on-road conditions.
Key Features
- Hexagonal Design: Secure fitment and easy installation with standard hex wrench compatibility.
- Precision Machining: CNC-finished brass for accurate fuel flow control and long-lasting durability.
- Universal Compatibility: Designed for MIKUNI carburetor systems to optimize fuel-air mixture ratios.
- Performance Optimization: Enhances engine responsiveness and power output across RPM ranges.
Why Choose This Product
MIKUNI jets deliver unmatched reliability and performance for riders seeking peak engine efficiency. The hex main jets ensure consistent fuel delivery, reduce hesitation, and improve overall engine performance. Whether you're tackling rugged terrain or racing on the track, these jets provide the precision needed for optimal power and control.
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Upgrade your powersports engine's fuel delivery system with MIKUNI's F4/042-180 Hex Main Jets. These high-performance jets ensure precise fuel metering for enhanced throttle response, consistent power delivery, and reliable operation in demanding off-road and on-road conditions.
Key Features
- Hexagonal Design: Secure fitment and easy installation with standard hex wrench compatibility.
- Precision Machining: CNC-finished brass for accurate fuel flow control and long-lasting durability.
- Universal Compatibility: Designed for MIKUNI carburetor systems to optimize fuel-air mixture ratios.
- Performance Optimization: Enhances engine responsiveness and power output across RPM ranges.
Why Choose This Product
MIKUNI jets deliver unmatched reliability and performance for riders seeking peak engine efficiency. The hex main jets ensure consistent fuel delivery, reduce hesitation, and improve overall engine performance. Whether you're tackling rugged terrain or racing on the track, these jets provide the precision needed for optimal power and control.
| SKU | GM61CCD1B7 |
|---|---|
| MPN | F4/042-180 |
| Brand | MIKUNI |
| Category | Jets |
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Frequently Asked Questions
The 180 indicates the jet size/orifice diameter. Larger numbers = richer fuel mixture. Jet sizing affects engine performance, fuel economy, and throttle response.
Hex jets are easier to install and remove with a wrench, reducing risk of stripping. They're preferred for frequent tuning or racing applications.
Jet selection depends on altitude, temperature, engine modifications, and desired performance. Start with manufacturer recommendations and adjust based on plug color and performance testing.
No. Mikuni jets are specific to Mikuni carburetors. Verify your carburetor model (VM, TMX, etc.) before purchasing.
Yes. Air filter upgrades, exhaust changes, or engine modifications typically require rejetting to maintain proper fuel mixture.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Hex wrench or socket (size depends on jet design)
- Small flathead screwdriver (for carburetor access)
- Gasket scraper (optional, for cleaning)
Pro Tips
- Keep jets organized by size when tuning
- Clean carburetor thoroughly before jet changes
- Test run after installation to verify proper jetting
- Hex design allows easier changes compared to slotted jets
- Document your jetting changes for future reference
Common Mistakes to Avoid
- Over-tightening the jet, which can damage the carburetor body
- Installing wrong jet size, affecting fuel mixture
- Not cleaning carburetor passages before installation
- Forgetting to replace gasket/o-ring if damaged
Comparison vs Stock/OEM
Improvements
- Enables performance optimization for specific conditions
- Hex design easier to work with than some OEM slotted jets
- Allows fine-tuning for altitude, temperature, and modifications
Considerations
- Requires carburetor knowledge to select correct size
- Improper jetting can cause poor performance or engine damage
- May need multiple jets for different conditions
Durability & Warranty
Expected Lifespan
Indefinite if not damaged; brass jets are durable
Warranty
Typically covered under Mikuni's standard warranty (verify with retailer)
Maintenance
No maintenance required; inspect for damage or clogging if carburetor runs poorly
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