Mikuni Large Round Main Jets #80 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.
Dial in the fuel mixture of your carbureted V-twin with this 4-pack of Mikuni Large Round Main Jets in #80 size. These genuine Mikuni components are crucial for fine-tuning fuel flow at cruise and part-throttle, ensuring optimal performance.
Why riders pick this
- Genuine Mikuni OEM quality for consistent performance
- Precision #80 main jet size for accurate fuel control
- Large round design for proper fitment
- Convenient 4-pack for comprehensive tuning
- Essential for optimizing air-fuel ratio on carbureted V-twins
When you're chasing that perfect air-fuel ratio on your Harley-Davidson or Indian Motorcycle, every component matters. These Mikuni Large Round Main Jets are designed to give you the control you need to properly tune your V-twin's carburetor, especially after upgrades to your intake or exhaust.
Precision Fuel Metering
- Genuine Mikuni OEM parts for reliable performance
- #80 main jet size for precise fuel flow adjustments
- Large round body style ensures correct fitment in compatible carburetors
- Supplied in a convenient 4-pack for tuning flexibility
Tuning for Performance
Changing your main jet is a critical step when modifying your V-twin. Whether you've installed a freer-flowing air cleaner, a performance exhaust, or are simply adjusting for changes in elevation, these #80 main jets allow you to richen or lean out your mixture. This pack provides the spares you need for iterative tuning sessions, helping you achieve smooth running and peak power.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FN100604-80
- Jet Size: #80
- Quantity: 4 per pack
- Weight: 0.05 lbs
- Country of Origin: Japan
Common questions
What is the primary function of a main jet?
Main jets control the amount of fuel delivered to your engine at mid to high throttle openings. Adjusting them is key to optimizing performance across the RPM range.
How do I know if this #80 jet is the right size for my V-twin?
Jetting requirements vary significantly based on your specific engine, modifications, and riding altitude. Consult your carburetor's tuning guide or a qualified tuner to determine the ideal size for your setup.
Will these jets fit any Mikuni carburetor?
These are Mikuni Large Round Main Jets. You'll need to confirm that your Mikuni carburetor uses this specific style and size before ordering to ensure compatibility.
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 | 134-7080 |
| WEIGHT | 0.05 lb |
