Mikuni Large Round Main Jets #115 4-Pack - 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.
Achieve precise fuel metering for your carbureted V-twin with this 4-pack of Mikuni #115 large round main jets. These genuine Mikuni components are engineered to fine-tune your air-fuel ratio. Essential for riders looking to maximize performance and efficiency on their Harley-Davidson or Indian Motorcycle.
Why riders pick this
- Genuine Mikuni OEM quality for precise tuning
- Meters fuel delivery at cruise and part-throttle
- #115 orifice size for targeted air-fuel ratio
- 4-pack for tuning flexibility and spares
- Fits V-twin carburetors using large round jets
When you modify your Harley-Davidson or Indian Motorcycle with performance parts like exhaust systems or air cleaners, adjusting your carburetor's jetting is often necessary. These Mikuni #115 large round main jets are designed to accurately meter fuel delivery at cruise and part-throttle speeds. This 4-pack provides the flexibility to experiment with different jetting combinations and ensures you have spares for future tuning sessions or maintenance.
Optimized Fuel Control
- Genuine Mikuni OEM jets for reliable function
- #115 orifice size for specific fuel requirements
- Large round body style for compatible Mikuni carburetors
- Convenient 4-pack for tuning and backup supply
Tuning for Optimal Performance
Proper main jet selection is critical for maintaining a healthy engine and achieving peak performance. A correctly jetted carburetor ensures your V-twin receives the right amount of fuel across varying engine loads and environmental conditions. Always refer to your carburetor's tuning guide or consult with a professional to determine the best jet size for your specific engine configuration and riding style.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FN100604-115
- Quantity: 4 per pack
- Orifice Size: #115
- Length: 4.4 in
- Width: 2.2 in
- Height: 0.6 in
- Weight: 0.05 lbs
- Country of Origin: Japan
Common questions
What role does a #115 main jet play in my V-twin's carburetor?
The #115 main jet is responsible for metering fuel flow at cruise and part-throttle engine speeds. Selecting the correct jet size helps optimize your air-fuel ratio, which is crucial for engine performance, efficiency, and longevity.
Are these jets suitable for my Harley-Davidson or Indian Motorcycle?
These large round main jets are compatible with V-twin motorcycles that utilize Mikuni carburetors designed for this style of jet. It's important to verify your specific carburetor model and its current jet requirements using our Shop by Bike tool to ensure proper fitment.
Why is a 4-pack of jets recommended for tuning?
A 4-pack allows you to have multiple jets for testing different sizes, which is common during carburetor tuning. It also provides spares, ensuring you're prepared for future adjustments due to modifications, altitude changes, or varying fuel types.
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 | Jets |
| SKU | 134-7115 |
| WEIGHT | 0.05 lb |
