Mikuni Large Round Main Jets #152.5 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.
Achieve precise carburetor tuning on your V-twin with these genuine Mikuni large round main jets in size #152.5. Sold in a convenient 4-pack, these jets are essential for accurate fuel metering. They ensure your Harley-Davidson or Indian Motorcycle engine runs optimally across various throttle positions.
Why riders pick this
- Genuine Mikuni OEM quality for reliable performance
- Specific #152.5 jet size for precise fuel control
- Large round design for compatible Mikuni carburetors
- Includes four jets for versatile tuning and spares
Every V-twin rider knows that a properly tuned carburetor is the heart of engine performance. These Mikuni large round main jets, specifically in the #152.5 size, are critical for dialing in your Harley-Davidson or Indian Motorcycle's fuel delivery. They provide the necessary precision to achieve the ideal air/fuel mixture, crucial for maximizing horsepower, torque, and overall rideability after performance modifications.
Optimized Engine Performance
- Genuine Mikuni OEM jets for trusted quality and fitment
- Specific #152.5 size for targeted fuel enrichment
- Large round design for broad compatibility with Mikuni carbs
- Convenient 4-pack for extensive tuning options and spares
Precision Tuning for Your V-Twin
The main jet plays a vital role in how your V-twin performs at mid-range and wide-open throttle. Having a 4-pack of these #152.5 Mikuni jets allows for easy experimentation and fine-tuning to match your engine's specific needs, whether that's compensating for altitude, temperature, or new air intake and exhaust systems. Ensure your Harley or Indian bike runs at its peak with correct jetting.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FN100604-152.5
- Quantity: 4 per pack
- 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 function of a main jet in a V-twin carburetor?
The main jet is responsible for metering the fuel flow primarily during mid-range to wide-open throttle operation, ensuring the engine receives the correct air-fuel mixture for optimal power and efficiency at higher RPMs.
How do I know if the #152.5 jet is the correct size for my motorcycle?
Proper jet sizing depends on various factors including your carburetor model, engine modifications, riding altitude, and ambient temperatures. Always consult your Mikuni carburetor manual or a professional tuner to confirm the appropriate jet size.
Are these Mikuni jets compatible with all Harley-Davidson and Indian Motorcycle models?
These genuine Mikuni large round main jets are designed for V-twin motorcycles that are equipped with Mikuni carburetors. They will not fit bikes using other carburetor brands, such as stock Keihin or S&S units, unless a Mikuni conversion has been performed.
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 | 134-71525 |
| WEIGHT | 0.05 lb |
