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Start ShoppingMIKUNI FMK-BN38/44 Carburetor Rebuild Kit - High-Performance Fuel System Replacement
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Description
Upgrade your MIKUNI carburetor's performance with this complete rebuild kit designed for precision fuel delivery. Perfect for restoring or maintaining high-performance engines in motorcycles and ATVs, this kit delivers reliable operation and long-lasting durability.
Key Features
- Brass Jets & Viton Seals: Corrosion-resistant materials ensure consistent fuel flow and prevent clogging in harsh conditions.
- Complete Gasket Set: Includes all necessary seals for a leak-free rebuild, eliminating the need for additional parts.
- Stainless Steel Springs: Enhanced spring tension improves diaphragm responsiveness for precise fuel metering.
- Various Jet Options: Customizable jet sizes allow fine-tuning for different fuel requirements and engine modifications.
- Compact Design: Lightweight (0.4 lbs) and compact (6x4x1.5") for easy storage and installation.
Why Choose This Product
Engineers for high-performance applications, this rebuild kit combines precision engineering with durable materials to ensure optimal fuel system efficiency. The inclusion of premium Viton seals and stainless steel components reduces maintenance intervals while maintaining factory-level performance. Ideal for riders seeking reliable fuel delivery without compromising engine power or fuel economy. Perfect for both professional mechanics and DIY enthusiasts looking to restore or upgrade their MIKUNI carburetor systems.
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Upgrade your MIKUNI carburetor's performance with this complete rebuild kit designed for precision fuel delivery. Perfect for restoring or maintaining high-performance engines in motorcycles and ATVs, this kit delivers reliable operation and long-lasting durability.
Key Features
- Brass Jets & Viton Seals: Corrosion-resistant materials ensure consistent fuel flow and prevent clogging in harsh conditions.
- Complete Gasket Set: Includes all necessary seals for a leak-free rebuild, eliminating the need for additional parts.
- Stainless Steel Springs: Enhanced spring tension improves diaphragm responsiveness for precise fuel metering.
- Various Jet Options: Customizable jet sizes allow fine-tuning for different fuel requirements and engine modifications.
- Compact Design: Lightweight (0.4 lbs) and compact (6x4x1.5") for easy storage and installation.
Why Choose This Product
Engineers for high-performance applications, this rebuild kit combines precision engineering with durable materials to ensure optimal fuel system efficiency. The inclusion of premium Viton seals and stainless steel components reduces maintenance intervals while maintaining factory-level performance. Ideal for riders seeking reliable fuel delivery without compromising engine power or fuel economy. Perfect for both professional mechanics and DIY enthusiasts looking to restore or upgrade their MIKUNI carburetor systems.| SKU | GM64382F19 |
|---|---|
| MPN | FMK-BN38/44 R |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Kawasaki | KX450F | 2008-2013 |
| Honda | CRF450R | 2009-2015 |
| Yamaha | YZ450F | 2010-2016 |
| Suzuki | RMZ450 | 2007-2012 |
Frequently Asked Questions
Fits Mikuni BN38/44 carburetors found on late 2000s-2010s 450F motocross bikes including Kawasaki KX450F, Honda CRF450R, Yamaha YZ450F, Suzuki RM-Z450.
Yes, includes full jet assortment: stock sizes for main, pilot, and needle jets.
Yes, genuine OEM Mikuni rebuild kit made in Japan.
No, specifically for BN38/44 series only. Check your carb model number.
Gaskets, O-rings, needle & seat, diaphragm, float, accelerator pump parts, complete jet set.
Installation Guide
Difficulty
Medium
Est. Time
1 hr 30 min
Tools Required
- Carburetor cleaner
- Compressed air
- Small flathead screwdriver
- Needle nose pliers
- Torque wrench
- Jet removal tool
Pro Tips
- Soak carb in cleaner overnight
- Use carb rebuild stand
- Double-check jet sizes against stock
- Apply light oil to moving parts
Common Mistakes to Avoid
- Not cleaning carb body thoroughly before install
- Damaging new diaphragm during assembly
- Incorrect float height adjustment
Comparison vs Stock/OEM
Genuine Mikuni kit identical to OEM parts used by manufacturers
Improvements
- New Viton seals prevent fuel leaks
- Updated diaphragm material resists cracking
- Includes all wear parts in one kit
Considerations
- N
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Durability & Warranty
Expected Lifespan
2-5 years with proper maintenance
Warranty
1 year Mikuni manufacturer warranty
Maintenance
Inspect diaphragms and seals annually, rebuild every 50-100 hours racing
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