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Start ShoppingMIKUNI FBN44/145 Diaphragm Assembly - High-Quality Carburetor Replacement for Powersports
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Description
Upgrade your Mikuni carburetor's fuel delivery system with this precision-engineered diaphragm assembly. Designed for powersports enthusiasts, this replacement part ensures consistent performance, reliable fuel metering, and seamless integration with your engine's intake system.
Key Features
- Durable Rubber with Metal Reinforcements: Combines flexible rubber with strategic metal reinforcements for enhanced durability and resistance to fuel and heat degradation.
- Perfect Fit for Mikuni FBN44/145 Carburetors: Precisely molded to match original equipment specifications for a seamless installation and optimal functionality.
- Lightweight Design: Weighs just 0.1 lbs (1.6 oz) to minimize strain on engine components while maintaining structural integrity.
- Compact Size: 2.5-inch diameter ensures compatibility with tight engine compartments without compromising performance.
Why Choose This Product
Whether you're maintaining a high-performance motorcycle, ATV, or UTV, this diaphragm assembly delivers unmatched reliability. Its reinforced construction withstands harsh operating conditions, while the precise fit ensures accurate fuel metering for smoother throttle response and improved engine efficiency. Replace worn components to restore peak performance and extend the life of your carburetor system.
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Upgrade your Mikuni carburetor's fuel delivery system with this precision-engineered diaphragm assembly. Designed for powersports enthusiasts, this replacement part ensures consistent performance, reliable fuel metering, and seamless integration with your engine's intake system.
Key Features
- Durable Rubber with Metal Reinforcements: Combines flexible rubber with strategic metal reinforcements for enhanced durability and resistance to fuel and heat degradation.
- Perfect Fit for Mikuni FBN44/145 Carburetors: Precisely molded to match original equipment specifications for a seamless installation and optimal functionality.
- Lightweight Design: Weighs just 0.1 lbs (1.6 oz) to minimize strain on engine components while maintaining structural integrity.
- Compact Size: 2.5-inch diameter ensures compatibility with tight engine compartments without compromising performance.
Why Choose This Product
Whether you're maintaining a high-performance motorcycle, ATV, or UTV, this diaphragm assembly delivers unmatched reliability. Its reinforced construction withstands harsh operating conditions, while the precise fit ensures accurate fuel metering for smoother throttle response and improved engine efficiency. Replace worn components to restore peak performance and extend the life of your carburetor system.| SKU | GM18093DFB |
|---|---|
| MPN | FBN44/145 |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Suzuki | DR350 | 1987-2003 |
| Suzuki | DR350S | 1990-1999 |
| Suzuki | SP370 | 1985-1989 |
| Suzuki | SP400 | 1983-1985 |
| Suzuki | SP370 | 1980-1982 |
| Suzuki | DR400 | 1979-1981 |
| Kawasaki | KDX200 | 1980-1988 |
| Kawasaki | KDX250 | 1983-1987 |
| Kawasaki | KDX250 | 1981-1982 |
| Kawasaki | KDX250 | 1980-1980 |
| Kawasaki | KDX400 | 1984-1987 |
| Kawasaki | KDX420 | 1980-1980 |
| Suzuki | DR350 | 1995-1996 |
| Suzuki | DR350 | 1991-1992 |
Frequently Asked Questions
Fits Mikuni BS40SS and VM40 series carburetors on various Suzuki DR350, Kawasaki KDX models as listed in fitment.
Yes, this is an OEM Mikuni diaphragm assembly, part number FBN44/145.
No, this is just the diaphragm, but it's recommended to inspect gaskets and needle while apart.
Yes, a worn diaphragm often causes sticky accelerator slides; replacement typically resolves it.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Phillips screwdriver
- small flathead screwdriver
- needle nose pliers
Pro Tips
- Use carb cleaner to clean mating surfaces
- Lubricate diaphragm with a tiny bit of clean engine oil for easier seating
- Inspect slide and needle while carb is apart
Common Mistakes to Avoid
- Damaging the new diaphragm during installation by using sharp tools
- Not cleaning carburetor body thoroughly before install
Comparison vs Stock/OEM
Direct OEM replacement for factory Mikuni diaphragm
Improvements
- Restores original crisp throttle response
- Prevents lean bogging from worn diaphragm
Considerations
- None - identical to stock
Durability & Warranty
Expected Lifespan
3-5 years or 5,000-10,000 miles depending on conditions
Warranty
Mikuni 1-year manufacturer warranty
Maintenance
Inspect annually for cracks or hardening; replace if accelerator pump fails
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