Mikuni HSR48 Smoothbore Race Kit Carburetor - Harley Touring & Softail
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.
The Mikuni HSR48 smoothbore carburetor race kit is engineered for V-twin motorcycles with heavily modified engines. It provides maximum fuel delivery and a wide tuning range, essential for built motors pushing serious power. Available in different bore sizes to match your specific engine displacement and modification level.
Why riders pick this
- Smoothbore design for enhanced airflow and precise fuel delivery
- Engineered for heavily modified V-twin engines
- Offers a wide tuning range for optimal performance
- Compatible with OEM Harley-Davidson throttle cables
Upgrade your V-twin's fuel system with the Mikuni HSR48 Smoothbore Race Kit Carburetor. This race-spec unit is designed to provide optimal fuel atomization and flow, critical for uncorking the full potential of high-performance Harley-Davidson engines. Whether you're running a big-inch motor or a custom build, the HSR48 delivers the precision and volume needed for serious power.
Optimized for Performance V-Twins
- Smoothbore design for superior airflow and precise tuning
- Available in bore sizes to match various engine modifications
- Engineered for maximum fuel delivery on built motors
- Compatible with OEM Harley-Davidson throttle cables for easier integration
The Right Carb for Your Build
Choosing the correct bore size is crucial for maximizing performance. The larger bore is ideal for heavily modified, high-displacement engines that demand the most fuel, while the smaller bore suits custom applications and can often work with stock-displacement engines that are looking for a significant performance bump. This kit provides the core carburetor, allowing you to select manifolds and other components tailored to your specific Harley Touring or Softail setup.
Specifications
- Brand: Mikuni
- Manufacturer Part #: F48-2
- Weight: 3.72 lbs
- Country of Origin: Japan
Common questions
What's the difference between the available bore sizes?
The larger bore is designed for heavily modified, large-displacement engines needing maximum fuel flow. The smaller bore suits custom builds and can be used on stock-displacement engines, often working with OEM Harley cables.
Are intake manifolds included with this kit?
No, intake manifolds are not included. You will need to source them separately to match your specific engine and mounting configuration.
Does this carburetor require a special throttle cable?
The smaller bore option is designed to be compatible with OEM Harley-Davidson throttle cables for straightforward installation. Check your specific model for compatibility.
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 | 14-2037 |
| WEIGHT | 3.72 lb |
