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Start ShoppingMIKUNI FBN38/477 Low Speed Adjuster with Cross Bar - Carburetor System for 2-Stroke Engines
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Description
Upgrade your 2-stroke engine's fuel delivery system with MIKUNI's FBN38/477 Low Speed Adjuster. This essential carburetor component delivers precise fuel-air mixture control for smoother acceleration and improved throttle response, perfect for motorcycle and ATV enthusiasts seeking peak performance.
Key Features
- Low-Speed Adjuster: Fine-tunes fuel delivery for optimal engine performance at lower RPMs.
- Cross Bar Design: Enhances structural integrity and ensures proper float bowl alignment.
- Compatibility: Specifically engineered for MIKUNI carburetor systems with 2-stroke engines.
- Durable Construction: Precision-machined for long-lasting reliability in demanding riding conditions.
Why Choose This Product
Engineers at MIKUNI designed this adjuster to provide precise control over fuel delivery, ensuring your engine runs efficiently across all operating conditions. The cross bar design prevents float bowl misalignment, reducing the risk of fuel starvation. Its robust construction withstands vibration and heat, making it ideal for high-performance applications. Whether you're tuning a classic motorcycle or modifying an ATV, this component offers the accuracy needed to achieve optimal power and fuel efficiency.
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Upgrade your 2-stroke engine's fuel delivery system with MIKUNI's FBN38/477 Low Speed Adjuster. This essential carburetor component delivers precise fuel-air mixture control for smoother acceleration and improved throttle response, perfect for motorcycle and ATV enthusiasts seeking peak performance.
Key Features
- Low-Speed Adjuster: Fine-tunes fuel delivery for optimal engine performance at lower RPMs.
- Cross Bar Design: Enhances structural integrity and ensures proper float bowl alignment.
- Compatibility: Specifically engineered for MIKUNI carburetor systems with 2-stroke engines.
- Durable Construction: Precision-machined for long-lasting reliability in demanding riding conditions.
Why Choose This Product
Engineers at MIKUNI designed this adjuster to provide precise control over fuel delivery, ensuring your engine runs efficiently across all operating conditions. The cross bar design prevents float bowl misalignment, reducing the risk of fuel starvation. Its robust construction withstands vibration and heat, making it ideal for high-performance applications. Whether you're tuning a classic motorcycle or modifying an ATV, this component offers the accuracy needed to achieve optimal power and fuel efficiency.
| SKU | GM7BACEA78 |
|---|---|
| MPN | FBN38/477 |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | VM series carburetors (e.g., Yamaha YZ, Honda XR/CRF, Kawasaki KX) | 1980-2020 |
Frequently Asked Questions
Fits Mikuni VM series carbs from VM26 to VM40, common on 2-stroke and 4-stroke dirt bikes.
Yes, it's the low-speed pilot jet adjuster screw with cross bar for precise tuning.
No, can often be done on the bike, but carb removal makes it easier.
Yes, allows fine-tuning of low-speed fuel mixture.
Installation Guide
Difficulty
Easy
Est. Time
10 min
Tools Required
- Small flathead screwdriver
- Needle nose pliers
Pro Tips
- Apply light oil to threads for smooth adjustment
- Turn clockwise to lean, counterclockwise to richen mixture
Common Mistakes to Avoid
- Stripping the brass threads
- Not cleaning carb body before install
Comparison vs Stock/OEM
Direct OEM replacement for Mikuni factory carbs
Improvements
- Precision machined for smoother adjustment
- Corrosion resistant plating
Considerations
- None - identical to OEM function
Durability & Warranty
Expected Lifespan
Indefinite with proper tuning (metal construction)
Warranty
Limited lifetime from Mikuni
Maintenance
Inspect for thread damage during carb cleaning
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