Mikuni Large Round Main Jets #117.5 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 flow at mid-to-high throttle with this 4-pack of Mikuni #117.5 large round main jets. These genuine Mikuni components are essential for carburetor tuning on V-twin motorcycles. Riders rely on accurate jetting to optimize performance across the powerband of their Harley-Davidson or Indian Motorcycle.
Why riders pick this
- Genuine Mikuni OEM quality for reliable tuning
- Controls fuel flow at mid-to-high throttle
- #117.5 jet size for precise air-fuel adjustments
- 4-pack provides flexibility for tuning and spares
- Designed for V-twin carburetors on Harley & Indian
Optimizing your V-twin's carburetor for peak performance often involves fine-tuning the main jets. This 4-pack of Mikuni #117.5 large round main jets provides the precise fuel metering needed for mid-to-high throttle positions. Whether you're compensating for engine modifications, changes in riding altitude, or different fuel types, these genuine Mikuni jets are a critical component in achieving the ideal air-fuel ratio for your Harley or Indian motorcycle.
Precise Performance Tuning
- Genuine Mikuni OEM jets for guaranteed quality
- #117.5 size for accurate mid-to-high throttle fueling
- Large round design fits compatible V-twin carburetors
- Convenient 4-pack for extensive tuning and spares
Essential for a Strong Running Engine
The main jet plays a significant role in how your V-twin performs under load, especially at higher speeds. Selecting the correct jet size ensures your engine receives adequate fuel, preventing both lean conditions that can cause damage and overly rich conditions that waste fuel and reduce power. Always refer to your carburetor's tuning manual or consult a professional for expert advice on jet selection for your specific setup.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FN100604-117.5
- Quantity: 4 per pack
- Jet Size: #117.5
- Length: 4.4 in
- Width: 2.2 in
- Height: 0.6 in
- Weight: 0.05 lbs
- Country of Origin: Japan
Common questions
What does the #117.5 jet size mean for my V-twin?
The #117.5 jet size indicates a specific fuel flow rate at mid-to-high throttle. This size allows you to fine-tune your air-fuel mixture, which is crucial for optimizing engine performance and efficiency, especially after modifications.
Will these Mikuni jets fit my Harley-Davidson or Indian Motorcycle?
These large round main jets are designed for V-twin motorcycles equipped with Mikuni carburetors that accept this style. To ensure correct fitment, please verify your carburetor type and current jet specifications before ordering, potentially using our Shop by Bike tool.
Why is a 4-pack of main jets beneficial for tuners?
A 4-pack provides multiple jets for making incremental adjustments during tuning sessions, which is common when dialing in a carburetor. It also ensures you have spare jets on hand, which is valuable for riders who frequently adjust their setup or encounter varying riding conditions.
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 | 134-71175 |
| WEIGHT | 0.05 lb |
