Your cart is empty
Start ShoppingMIKUNI F4/042-175 Hex Main Jets - Precision Fuel Delivery for High-Performance Powersports Engines
Fits your
May not fit your
Description
Upgrade your powersports engine's fuel delivery system with MIKUNI's F4/042-175 Hex Main Jets. These precision-engineered jets ensure optimal air-fuel ratios for enhanced power, responsiveness, and reliability in high-performance motorcycles, ATVs, and off-road vehicles.
Key Features
- Hexagonal Design: Ensures secure, leak-free installation in MIKUNI carburetor systems for consistent fuel flow.
- High-Durability Brass Construction: Resists corrosion and wear, maintaining accuracy under extreme operating conditions.
- Compatibility: Specifically designed for MIKUNI F4 carburetors, ensuring seamless integration with existing fuel delivery systems.
- Adjustable Fuel Metering: Allows fine-tuning of air-fuel ratios for custom performance tuning and fuel efficiency optimization.
- Easy Installation: Streamlined design reduces setup time and minimizes the risk of improper calibration.
Why Choose This Product
MIKUNI Hex Main Jets deliver unmatched precision for riders demanding peak engine performance. Their durable construction ensures long-term reliability, while the adjustable metering capability gives you control over fuel efficiency and power output. Whether you're modifying a high-performance motorcycle or optimizing an ATV for off-road challenges, these jets provide the accuracy and consistency needed to elevate your riding experience.
Delivery
Checking availability...
Estimated arrival
Order within to ship today
Orders ship
Shipping to
Enter your ZIP code for delivery estimate
Price Match Guarantee
Found it cheaper?
Log in to submit a price match request.
Price
Quantity
Free Shipping $100+
14-Day Returns
Secure Checkout
Price Match
Complete the Build
This item
$21.85
In Cart
Upgrade your powersports engine's fuel delivery system with MIKUNI's F4/042-175 Hex Main Jets. These precision-engineered jets ensure optimal air-fuel ratios for enhanced power, responsiveness, and reliability in high-performance motorcycles, ATVs, and off-road vehicles.
Key Features
- Hexagonal Design: Ensures secure, leak-free installation in MIKUNI carburetor systems for consistent fuel flow.
- High-Durability Brass Construction: Resists corrosion and wear, maintaining accuracy under extreme operating conditions.
- Compatibility: Specifically designed for MIKUNI F4 carburetors, ensuring seamless integration with existing fuel delivery systems.
- Adjustable Fuel Metering: Allows fine-tuning of air-fuel ratios for custom performance tuning and fuel efficiency optimization.
- Easy Installation: Streamlined design reduces setup time and minimizes the risk of improper calibration.
Why Choose This Product
MIKUNI Hex Main Jets deliver unmatched precision for riders demanding peak engine performance. Their durable construction ensures long-term reliability, while the adjustable metering capability gives you control over fuel efficiency and power output. Whether you're modifying a high-performance motorcycle or optimizing an ATV for off-road challenges, these jets provide the accuracy and consistency needed to elevate your riding experience.
| SKU | GM2AF7F61F |
|---|---|
| MPN | F4/042-175 |
| Brand | MIKUNI |
| Category | Jets |
0.0
0 reviews
0
Log in to write a review.
Reviews
No reviews yet. Be the first to review this product!
Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | Carbureted motorcycles/ATVs (Keihin/PVM compatible) | 1980-2025 |
| Yamaha | XT/TT-R series | 1990-2010 |
| Honda | XR series | 1985-2005 |
| Kawasaki | KX/KLX | 1995-2015 |
Frequently Asked Questions
Fits Mikuni VM26-VM34, PF, BS series carbs; also Keihin PWK/FCR with adapter kits.
Depends on engine mods, altitude, temp. Use jetting chart or kit for your setup.
Hex style easier to remove/install without slipping screwdriver.
Individual; buy jet kit for full range (130-190 sizes).
No, carbureted only.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jetting gauge (optional)
Pro Tips
- Remove float bowl completely for access; note stock jet size before swapping; test plug chop for tuning
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Incorrect jet size selection
Comparison vs Stock/OEM
Direct replacement for OEM/Keihin jets in many bikes
Improvements
- Precision machined brass for consistent fuel flow
- Easier hex install vs OEM slotted
- Ideal for performance tuning
Considerations
- Requires re-jetting for mods; not plug-and-play
Durability & Warranty
Expected Lifespan
Indefinite with proper tuning (no wear parts)
Warranty
Limited lifetime (manufacturer defect only)
Maintenance
Inspect during carb cleaning; replace if clogged
What Others Are Saying
Reviews from across the web
