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Start ShoppingMIKUNI FBV18I/04 Needle Jet O-Ring - NBR Rubber for Carburetor Fuel Systems
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Description
Upgrade your carburetor's fuel system reliability with this specialized O-ring designed for MIKUNI's FBV18I/04 Needle Jet. Crafted from durable NBR rubber, this critical component ensures consistent fuel flow and prevents leaks in demanding riding conditions.
Key Features
- Material: Nitrile Butadiene Rubber (NBR) for exceptional resistance to fuel and heat
- Dimensions: 18mm outer diameter with 4mm inner diameter for precise fitment
- Thickness: 1.5-2mm for optimal sealing without compromising airflow
- Weight: 0.5 grams for lightweight performance efficiency
Why Choose This Product
Engineers designed this O-ring to maintain peak fuel system performance in high-output engines. Its NBR construction withstands fuel exposure and temperature fluctuations, while precise sizing ensures compatibility with MIKUNI's FBV18I/04 Needle Jet. Riders benefit from improved fuel efficiency, reduced maintenance needs, and reliable operation during aggressive riding scenarios.
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Upgrade your carburetor's fuel system reliability with this specialized O-ring designed for MIKUNI's FBV18I/04 Needle Jet. Crafted from durable NBR rubber, this critical component ensures consistent fuel flow and prevents leaks in demanding riding conditions.
Key Features
- Material: Nitrile Butadiene Rubber (NBR) for exceptional resistance to fuel and heat
- Dimensions: 18mm outer diameter with 4mm inner diameter for precise fitment
- Thickness: 1.5-2mm for optimal sealing without compromising airflow
- Weight: 0.5 grams for lightweight performance efficiency
Why Choose This Product
Engineers designed this O-ring to maintain peak fuel system performance in high-output engines. Its NBR construction withstands fuel exposure and temperature fluctuations, while precise sizing ensures compatibility with MIKUNI's FBV18I/04 Needle Jet. Riders benefit from improved fuel efficiency, reduced maintenance needs, and reliable operation during aggressive riding scenarios.| SKU | GMFD7E562D |
|---|---|
| MPN | FBV18I/04 |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various (Suzuki, Yamaha, Kawasaki, Honda) | Models using Mikuni VM or BS carburetors (e.g., Suzuki RM250, Yamaha YZ250, Kawasaki KX250, Honda CR250) | 1980-2024 |
Frequently Asked Questions
Fits Mikuni VM series and BS series carburetors with needle jet setter assembly, common on 2-stroke and 4-stroke dirt bikes from 1980s onward.
Yes, FBV18I/04 is the official Mikuni part number for this O-ring.
No, this is just the O-ring seal for the needle jet setter; replace if cracked or leaking.
Aftermarket may fit but genuine Mikuni recommended for fuel compatibility and seal integrity.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Needle nose pliers
Pro Tips
- Lightly lubricate with carb cleaner or silicone spray
- Inspect needle jet for wear during replacement
Common Mistakes to Avoid
- Using incorrect size O-ring causing leaks
- Not lubricating O-ring before install
Comparison vs Stock/OEM
Direct OEM replacement part from Mikuni (carburetors are often OEM on Japanese bikes)
Improvements
- Perfect fit and material match to original
- Fuel-resistant compound
Considerations
- None - identical to factory spec
Durability & Warranty
Expected Lifespan
2-5 years or 100+ hours of use depending on fuel quality
Warranty
Mikuni lifetime warranty against defects
Maintenance
Inspect during annual carb service; replace if swollen or cracked
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