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Start ShoppingMIKUNI FN100604-170 Large Round Main Jets - Precision Fuel Flow Control for Carburetors
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Description
Elevate your engine's performance with MIKUNI's Large Round Main Jets, engineered for precise fuel flow control and reliable operation. These critical components ensure consistent fuel delivery, enhancing power output and throttle responsiveness across a range of powersports applications.
Key Features
- Precision Engineering: Meticulously crafted for optimal fuel metering and consistent engine performance.
- Durable Construction: High-quality materials withstand harsh conditions for long-lasting reliability.
- Universal Compatibility: Designed to fit standard carburetor systems for easy installation.
Why Choose This Product
MIKUNI's Large Round Main Jets deliver unmatched accuracy in fuel delivery, ensuring peak engine efficiency and smooth operation. Whether you're tuning a motorcycle, ATV, or off-road vehicle, these jets provide the precision needed for reliable performance. Their robust design resists clogging and wear, reducing maintenance while maintaining consistent power output. Perfect for riders seeking precise control over fuel-air mixture for enhanced throttle response and fuel efficiency.
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Elevate your engine's performance with MIKUNI's Large Round Main Jets, engineered for precise fuel flow control and reliable operation. These critical components ensure consistent fuel delivery, enhancing power output and throttle responsiveness across a range of powersports applications.
Key Features
- Precision Engineering: Meticulously crafted for optimal fuel metering and consistent engine performance.
- Durable Construction: High-quality materials withstand harsh conditions for long-lasting reliability.
- Universal Compatibility: Designed to fit standard carburetor systems for easy installation.
Why Choose This Product
MIKUNI's Large Round Main Jets deliver unmatched accuracy in fuel delivery, ensuring peak engine efficiency and smooth operation. Whether you're tuning a motorcycle, ATV, or off-road vehicle, these jets provide the precision needed for reliable performance. Their robust design resists clogging and wear, reducing maintenance while maintaining consistent power output. Perfect for riders seeking precise control over fuel-air mixture for enhanced throttle response and fuel efficiency.
| SKU | GM9D288CEC |
|---|---|
| MPN | FN100604-170 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various (Honda, Yamaha, Kawasaki, Suzuki) | Carbureted motorcycles and ATVs | 1980-2025 |
Frequently Asked Questions
Fits most Mikuni round-slide carbs including VM series (26-40mm), TM, HSR, BS30-PM, BS34/36/38/40.
Use plug chop method or wideband O2 sensor; #170 is for richer main circuit, common for high altitude or modded engines.
Yes, OEM Mikuni part number FN100604-170, not aftermarket knockoff.
No, designed for Mikuni carbs; Keihin uses different threading and flow specs.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet needle holder (optional)
Pro Tips
- Remove float bowl completely for access; test plug chop after install to verify mixture
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Incorrect jet size selection without testing
Comparison vs Stock/OEM
Direct OEM replacement for factory Mikuni jets
Improvements
- Precision machined for consistent flow
- Pure brass construction resists corrosion
Considerations
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Durability & Warranty
Expected Lifespan
Indefinite with proper maintenance (does not wear out)
Warranty
Limited lifetime (manufacturer defect only)
Maintenance
Inspect for debris/clogs during carb cleaning; replace if damaged
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