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Start ShoppingMIKUNI FHS42/003 Air Box Adapter O-Ring Seal - NBR Rubber Intake System Seal
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Description
Ensure optimal engine performance with this high-quality MIKUNI FHS42/003 O-Ring Seal. Designed for precision fit and durability, this rubber seal prevents air leaks and maintains proper fuel-air mixture for smooth power delivery.
Key Features
- Material: Nitrile Butadiene Rubber (NBR) for exceptional resistance to fuel, oil, and heat
- Dimensions: 42mm outer diameter, 38mm inner diameter, 3mm thickness for perfect adapter compatibility
- Weight: 0.01 lbs - ultra-lightweight design without compromising durability
Why Choose This Product
This specialized O-ring seal is engineered to maintain airtight integrity in high-performance carburetor systems. Its NBR material withstands extreme temperatures and chemical exposure, while precise dimensions ensure a snug fit for MIKUNI air box adapters. Riders benefit from improved engine efficiency, reduced fuel waste, and reliable performance in demanding conditions. The lightweight construction also minimizes stress on surrounding components, extending system lifespan.
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Ensure optimal engine performance with this high-quality MIKUNI FHS42/003 O-Ring Seal. Designed for precision fit and durability, this rubber seal prevents air leaks and maintains proper fuel-air mixture for smooth power delivery.
Key Features
- Material: Nitrile Butadiene Rubber (NBR) for exceptional resistance to fuel, oil, and heat
- Dimensions: 42mm outer diameter, 38mm inner diameter, 3mm thickness for perfect adapter compatibility
- Weight: 0.01 lbs - ultra-lightweight design without compromising durability
Why Choose This Product
This specialized O-ring seal is engineered to maintain airtight integrity in high-performance carburetor systems. Its NBR material withstands extreme temperatures and chemical exposure, while precise dimensions ensure a snug fit for MIKUNI air box adapters. Riders benefit from improved engine efficiency, reduced fuel waste, and reliable performance in demanding conditions. The lightweight construction also minimizes stress on surrounding components, extending system lifespan.
| SKU | GM3D1EBC68 |
|---|---|
| MPN | FHS42/003 |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Yamaha | YZ450F | 2009-2014 |
| Yamaha | WR450F | 2009-2014 |
| Kawasaki | KX450F | 2010-2015 |
| Honda | CRF450R | 2008-2012 |
Frequently Asked Questions
Primarily Yamaha YZ450F/WR450F (2009-2014), Kawasaki KX450F (2010-2015), and some Honda CRF450R with Mikuni carbs. Check exact fitment for your model.
Yes, genuine Mikuni replacement part for their carburetor airbox adapters.
No, this is just the O-ring seal for the adapter flange.
Designed for OEM Mikuni carbs; measure your adapter groove to confirm (42mm OD).
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Phillips screwdriver
- flathead screwdriver
Pro Tips
- Clean mating surfaces thoroughly
- Use isopropyl alcohol to clean, avoid petroleum-based cleaners
Common Mistakes to Avoid
- Not cleaning the groove before installation
- Using lubricant that degrades rubber
Comparison vs Stock/OEM
Direct OEM replacement for Mikuni-equipped bikes; identical to factory seal
Improvements
- None - it's the genuine part
- Ensures perfect sealing vs. worn originals
Considerations
- Replace if original is cracked or leaking
Durability & Warranty
Expected Lifespan
3-5 years or 100+ hours of riding with proper maintenance
Warranty
Mikuni lifetime warranty against defects
Maintenance
Inspect during air filter changes; replace if hardened or cracked
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