Mikuni Air Box Adapter O-Ring Seal - Harley & Indian V-Twin
About Mikuni
Mikuni has supplied carburetors and fuel-system components to the motorcycle industry for decades, and its HSR series remains a common choice for carbureted Evolution and Twin Cam V-twins where a clean, tunable fuel curve matters more than electronics.
Maintain optimal engine performance and prevent vacuum leaks with the genuine Mikuni Air Box Adapter O-Ring Seal for V-twin motorcycles. This crucial component is engineered to create a tight, reliable seal between your air box and carburetor adapter, ensuring proper air-fuel mixture in carbureted Harley-Davidson and Indian Motorcycle models.
Why riders pick this
- Genuine Mikuni OEM part for reliable quality
- Creates an airtight seal between air box and carburetor adapter
- Prevents vacuum leaks and ensures proper air-fuel mixture
- Direct-fit replacement for carbureted V-twin motorcycles
- Essential for consistent engine performance
A healthy running V-twin depends on a perfectly sealed intake system. This authentic Mikuni O-ring seal is a direct-fit replacement part, designed to restore the integrity of your airbox-to-carburetor connection. By preventing unwanted air intrusion, it helps your engine maintain consistent performance, smoother idle, and responsive acceleration, avoiding common issues associated with air leaks.
Critical for Carbureted Performance
- Genuine Mikuni OEM replacement part for assured quality
- Creates a tight, airtight seal between the air box and carburetor adapter
- Prevents vacuum leaks that can affect engine performance
- Designed for carbureted Harley-Davidson and Indian Motorcycle V-twins
Reliable Sealing for Your V-Twin
Don't let a compromised seal degrade your ride quality. This Mikuni O-ring is a small but vital component that plays a big role in your engine's efficiency. Replacing a worn, cracked, or hardened O-ring with this genuine part will help ensure your carbureted V-twin runs as intended, delivering consistent power and a stable idle.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FHS42/003
- Length: 4.4 in
- Width: 3.3 in
- Height: 0.3 in
- Weight: 0.05 lbs
- Country of Origin: Japan
Common questions
What is the primary function of this Mikuni O-ring seal?
This O-ring seal creates an airtight connection between your air box and the carburetor adapter, preventing vacuum leaks that can lead to poor engine performance and an incorrect air-fuel mixture.
How do I know if I need to replace this O-ring?
You should consider replacement if you notice signs of an air leak at the adapter joint, such as erratic idle, hesitation during acceleration, or if the existing O-ring appears cracked, brittle, or flattened during inspection.
Is this O-ring compatible with fuel-injected Harley-Davidson models?
No, this Mikuni Air Box Adapter O-Ring Seal is specifically designed for carbureted V-twin motorcycles and is not compatible with fuel-injected models.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Mikuni |
| TYPE | Intake/Carb/Fuel System |
| SKU | 14-2024 |
| WEIGHT | 0.05 lb |
