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Start ShoppingMIKUNI F4/042-200 Hex Main Jets - Precision Fuel Jetting for High-Performance Engines
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Description
Elevate your engine's performance with MIKUNI's F4/042-200 Hex Main Jets, engineered for precise fuel-air mixture control in high-output engines. These critical carburetor components ensure consistent power delivery and efficient combustion for riders demanding peak performance.
Key Features
- Hexagonal Jet Design: Precise fuel metering for responsive throttle response and smooth power delivery.
- Durable Brass Construction: Resists corrosion and maintains accuracy under extreme operating conditions.
- Engineered for Compatibility: Specifically calibrated for MIKUNI carburetor systems to ensure optimal fuel flow rates.
- Easy Installation: Streamlined design for quick replacement without compromising performance.
- Adjustable Flow Rates: Fine-tune fuel delivery for custom tuning and varying riding conditions.
Why Choose This Product
Whether you're modifying a high-performance engine or optimizing stock setups, these jets deliver reliable fuel control that enhances throttle response, improves fuel efficiency, and ensures consistent power output. Their precision engineering makes them ideal for racing, off-road, and street applications where performance and reliability are paramount.
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Elevate your engine's performance with MIKUNI's F4/042-200 Hex Main Jets, engineered for precise fuel-air mixture control in high-output engines. These critical carburetor components ensure consistent power delivery and efficient combustion for riders demanding peak performance.
Key Features
- Hexagonal Jet Design: Precise fuel metering for responsive throttle response and smooth power delivery.
- Durable Brass Construction: Resists corrosion and maintains accuracy under extreme operating conditions.
- Engineered for Compatibility: Specifically calibrated for MIKUNI carburetor systems to ensure optimal fuel flow rates.
- Easy Installation: Streamlined design for quick replacement without compromising performance.
- Adjustable Flow Rates: Fine-tune fuel delivery for custom tuning and varying riding conditions.
Why Choose This Product
Whether you're modifying a high-performance engine or optimizing stock setups, these jets deliver reliable fuel control that enhances throttle response, improves fuel efficiency, and ensures consistent power output. Their precision engineering makes them ideal for racing, off-road, and street applications where performance and reliability are paramount.| SKU | GM188375DC |
|---|---|
| MPN | F4/042-200 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various (Yamaha, Suzuki, Honda, Kawasaki) | Carbureted motorcycles/ATVs with Mikuni VM or TM series carbs | 1980-2025 |
Frequently Asked Questions
Fits Mikuni VM, TM, HSR, and BS series carbs with hex main jet design. Check your carb model.
This is the hex (six-sided) head style, part number F4/042-200 for #200 size.
Sold individually; buy multiples for tuning different conditions.
No, this is for carbureted engines only.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet cleaning needle or wire
Pro Tips
- Use a jetting chart for your altitude/temp; clean jet thoroughly; torque gently to avoid stripping threads
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Installing wrong jet size without re-jetting chart
Comparison vs Stock/OEM
Direct OEM replacement or upgrade for precise fuel metering
Improvements
- Superior brass machining for consistent flow
- Easier to grip/install than round jets
Considerations
- Must match exact size to stock for plug-and-play
Durability & Warranty
Expected Lifespan
Indefinite with proper cleaning; lasts engine life
Warranty
Limited lifetime from Mikuni against defects
Maintenance
Clean with carb cleaner every service; inspect for wear/clogging
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