Mikuni Large Round Main Jets #67.5 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.
These genuine Mikuni large round main jets, sized #67.5, are sold as a four-pack for carburetor tuning on V-twin motorcycles. They provide precise fuel metering in the midrange and cruise zones, essential for optimizing performance. Ensure your Harley-Davidson or Indian Motorcycle engine runs efficiently and powerfully.
Why riders pick this
- Genuine Mikuni for trusted quality and fitment
- Size #67.5 for precise midrange fuel control
- Four-pack for versatile tuning and spares
- For V-twin motorcycles with Mikuni carburetors
When you're serious about getting every ounce of performance from your carbureted V-twin, accurate main jet selection is non-negotiable. This four-pack of genuine Mikuni large round main jets, size #67.5, is designed to help you dial in the fuel mixture for optimal power and efficiency at cruising speeds and under acceleration. Whether you've installed a new exhaust system, upgraded your air intake, or are simply adjusting for different atmospheric conditions, these jets are a critical component for a well-tuned engine.
Refined Midrange Performance
- Genuine Mikuni OEM components for reliable and consistent performance
- Size #67.5 large round main jets for precise midrange fuel tuning
- Four-pack provides flexibility for comprehensive tuning and spares
- Essential for V-twin motorcycles with Mikuni carburetors
Optimizing Your Carburetor for the Road
Achieving a smooth, powerful, and efficient engine requires careful attention to detail, and proper main jetting is a cornerstone of that process. This four-pack of #67.5 Mikuni large round main jets empowers you to fine-tune your fuel delivery, preventing common issues like lean conditions, hesitation, or rich running. For Harley-Davidson and Indian Motorcycle riders looking to maximize their V-twin's potential, these jets are an indispensable tool for achieving a truly optimized carburetor setup.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FN100604-67.5
- Quantity: 4 per pack
- Size: 67.5
- Length: 4.4 in
- Width: 2.2 in
- Height: 0.6 in
- Weight: 0.05 lbs
- Country of Origin: Japan
Common questions
What is the primary function of a main jet in a carburetor?
The main jet controls the amount of fuel delivered to the engine at mid-range to wide-open throttle. It's crucial for optimizing power output and fuel efficiency during acceleration and sustained cruising.
How do I know if I need a #67.5 main jet?
The ideal main jet size depends on your carburetor model, engine modifications (like air cleaner, cams, exhaust), riding altitude, and fuel type. We recommend consulting a Mikuni tuning guide or a qualified mechanic to determine the best size for your specific V-twin setup.
Will these large round main jets fit any Mikuni carburetor?
These are specifically Mikuni large round main jets. They will only fit Mikuni carburetors that are designed to accept this particular style of main jet. Always verify your carburetor model's jet type before purchasing.
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 | 134-70675 |
| WEIGHT | 0.05 lb |
