Mikuni Large Round Main Jets #97.5 - 4 Pack for 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.
Genuine Mikuni large round main jets in #97.5 size are vital for precise carburetor tuning on your V-twin. This 4-pack provides the necessary components to meter fuel flow accurately, ensuring optimal performance for your Harley-Davidson or Indian Motorcycle.
Why riders pick this
- Genuine Mikuni OEM component for quality assurance
- Precise #97.5 main jet size for accurate tuning
- Designed for V-twin motorcycles with Mikuni carbs
- Convenient 4-pack for multiple adjustments or spares
These Mikuni large round main jets are specifically designed to control fuel flow during cruise and part-throttle operation. A #97.5 jet size offers a precise increment for tuning your air-fuel mixture, especially when compensating for changes in elevation, temperature, or engine modifications. Having a 4-pack on hand means you're prepared to dial in your carburetor for peak efficiency and power.
Optimized Fuel Delivery for Your V-Twin
- Genuine Mikuni OEM component for reliable performance
- #97.5 jet size for accurate fuel metering
- Large round body design compatible with Mikuni carburetors
- 4-pack quantity for tuning flexibility and spares
Achieve Perfect Carburetor Calibration
Whether you're fine-tuning a stock Mikuni carburetor or an aftermarket unit on your Harley or Indian, the right main jet makes all the difference. The #97.5 jet provides a slight enrichment compared to smaller sizes, which can be beneficial after certain modifications. Always consult your carburetor's manual or a trusted tuning guide to ensure you select the correct jet for your specific setup and riding conditions.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FN100604-97.5
- Quantity: 4 per pack
- Jet Size: #97.5
- Length: 4.4 in
- Width: 2.2 in
- Height: 0.6 in
- Weight: 0.05 lbs
- Country of Origin: Japan
Common questions
What does a main jet do?
The main jet controls fuel flow during cruise and part-throttle operation. Larger numbers (#97.5 vs. #95) richen the mixture slightly.
How many jets are in a pack?
This is a 4-pack — enough for one or two carburetors depending on your bike's setup, providing flexibility for tuning or spares.
Will I need different jets for altitude or fuel type?
Yes. Altitude, temperature, and fuel octane can require jet changes to maintain optimal air-fuel mixture. Confirm your specific needs with your carburetor manual.
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 | 134-70975 |
| WEIGHT | 0.05 lb |
