Mikuni Large Round Main Jets #85 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 the performance of your carbureted Harley-Davidson or Indian Motorcycle with this 4-pack of Mikuni Large Round Main Jets in #85 size. These genuine Mikuni components are vital for fine-tuning fuel delivery at cruise and part-throttle conditions.
Why riders pick this
- Genuine Mikuni OEM quality for consistent results
- Accurate #85 main jet size for controlled fuel delivery
- Large round design for proper fitment
- Convenient 4-pack for flexible tuning
- Essential for dialing in carburetors on V-twin motorcycles
When you're chasing the perfect tune for your V-twin, precise fuel metering is key. These Mikuni Large Round Main Jets, sized #85, provide the essential components needed to adjust your carburetor's fuel flow, especially after modifying your air intake, exhaust, or if you're riding at different elevations. This 4-pack ensures you have the flexibility for proper tuning.
Enhanced Carburetor Performance
- Genuine Mikuni OEM parts for dependable operation
- #85 main jet size for accurate fuel mixture adjustments
- Large round body style ensures seamless fitment in compatible carburetors
- Supplied in a 4-pack, providing options for iterative tuning
Critical for Optimal Running
The main jet plays a crucial role in how your V-twin performs at various throttle positions. Whether you're aiming for better throttle response, improved fuel efficiency, or simply a smoother running engine, having the right main jet is fundamental. This four-pack allows you to fine-tune your setup, ensuring your Harley-Davidson or Indian Motorcycle runs optimally under diverse conditions.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FN100604-85
- Quantity: 4 per pack
- Jet Size: #85
- Length: 6.2 in
- Width: 3.95 in
- Height: 0.65 in
- Weight: 0.01 lbs
- Country of Origin: Japan
Common questions
What is the function of a main jet in a carburetor?
Main jets are responsible for metering fuel flow at cruise and part-throttle conditions. Adjusting their size helps fine-tune the air-fuel mixture for your engine's specific needs and environment.
How do I determine if a #85 jet is correct for my bike?
The correct jet size depends on your engine's modifications, altitude, and other tuning factors. It's best to consult your carburetor manual or a tuning guide, and often involves testing different sizes.
Why does this come in a 4-pack?
A 4-pack provides multiple jets, allowing you to try different sizes during the tuning process without needing to reorder. This is crucial for accurately dialing in your carburetor's performance.
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 | 134-7085 |
| WEIGHT | 0.01 lb |
