Mikuni Large Round Main Jets #185 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.
Optimize your carbureted V-twin with this 4-pack of genuine Mikuni Large Round Main Jets. Sized at #185, these jets are essential for controlling fuel flow at cruise and part-throttle RPMs. They are particularly crucial for maintaining proper jetting after intake or exhaust modifications on your Harley-Davidson or Indian Motorcycle.
Why riders pick this
- Genuine Mikuni OEM quality for precise tuning
- Specific #185 main jet size for optimal fuel delivery
- Ideal for V-twin motorcycles with large round Mikuni carburetors
- 4-pack provides spares and options for varied tuning
Achieving the right air/fuel mixture is fundamental for your V-twin's performance and longevity. These Mikuni Large Round Main Jets, in a #185 size, provide the precise fuel metering needed for optimal operation, especially after upgrading your intake or exhaust. As genuine Mikuni OEM components, they deliver the consistent quality and accuracy that serious riders demand for their Harley-Davidson and Indian Motorcycle engines.
Critical for V-Twin Performance
- Genuine Mikuni OEM jets for reliable operation
- #185 main jet size for fine-tuning fuel delivery
- Designed for large round Mikuni carburetors
- Supplied as a 4-pack for tuning flexibility or spares
Expert-Level Carburetor Tuning
The #185 main jet offers a specific step in enriching your fuel mixture, often necessary to prevent lean conditions that can arise from performance upgrades. Proper jetting ensures smooth throttle response, optimal power output, and prevents potential engine damage. Always consult your carburetor's tuning guide and consider factors like altitude and engine modifications when selecting the appropriate jet size for your specific V-twin setup.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FN100604-185
- Quantity: 4 per pack
- Jet Size: #185
- Country of Origin: Japan
Common questions
What is the function of a #185 main jet?
A #185 main jet controls the fuel flow rate at cruise and part-throttle RPMs. Selecting the correct size is crucial for proper fuel mixture.
Will these jets fit my Harley-Davidson or Indian Motorcycle?
These jets are compatible if your Harley-Davidson or Indian Motorcycle is equipped with a Mikuni large round carburetor. Always confirm your specific carb model.
Why are these jets sold in a 4-pack?
The 4-pack allows for comprehensive tuning, provides spares for testing different jet sizes, or supplies for multiple carburetors.
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 | 134-7185 |
| WEIGHT | 0.05 lb |
