Mikuni Smoothbore 42mm Carburetor Kit - 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.
Unleash the full potential of your modified V-twin engine with the Mikuni Smoothbore 42mm Carburetor Kit. This kit is engineered for custom applications, providing precise fuel metering and improved throttle response.
Why riders pick this
- Smoothbore design for improved airflow and throttle response
- Engineered for custom and modified V-twin engines
- Direct compatibility with OEM Harley throttle cables
- Tunable jetting for precise fuel delivery
- Compact footprint for versatile installation
Designed for performance, this 42mm smoothbore carburetor is a significant upgrade for riders looking to maximize their engine's output. It's built to integrate seamlessly into Harley-Davidson and Indian Motorcycle builds, utilizing OEM Harley throttle cables for a straightforward setup.
Optimized for Performance Builds
- 42mm smoothbore design for enhanced airflow and fuel atomization
- Engineered for custom V-twin applications and modified engines
- Compatible with OEM Harley throttle cables for direct integration
- Tunable jetting allows for precise calibration to your specific engine build
Installation and Tuning Considerations
This Mikuni 42mm smoothbore carburetor is a performance-oriented component intended for custom V-twin engines. While it integrates with OEM Harley throttle cables, riders should confirm intake manifold compatibility for their specific setup. Fine-tuning with different jetting will be essential to achieve optimal performance and a crisp throttle response on your modified Harley or Indian Motorcycle.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FTM42-6
- Length: 6.2 in
- Width: 6.4 in
- Height: 6.6 in
- Weight: 2.89 lbs
- Country of Origin: Japan
Common questions
Will this carburetor fit my stock Harley or Indian?
This Mikuni 42mm smoothbore carburetor is designed for custom and modified V-twin engines. Stock OEM bikes typically use factory carburetors, so verify your intake manifold compatibility before ordering.
Does this kit include an intake manifold?
No, intake manifolds are sold separately. You will need to source a compatible intake manifold that matches the 42mm bore for your specific engine configuration.
Are my stock Harley throttle cables compatible with this carburetor?
Yes, this kit is specifically configured to work with OEM Harley-Davidson cable-operated throttles, making integration into your build more straightforward.
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 | Intake/Carb/Fuel System |
| SKU | 14-1988 |
| WEIGHT | 2.89 lb |
