Mikuni HSR 45/42 Total Carburetor Kit - Harley Evolution
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 Harley Evolution Big Twin with the Mikuni HSR 45/42 Total Carburetor Kit. This comprehensive kit delivers high-flow intake, designed to significantly improve performance on both Evolution and Twin Cam engines. It's a complete bolt-on solution to uncork your V-twin.
Why riders pick this
- High-flow intake for Evolution Big Twin engines
- Special intake manifold included for optimized performance
- High-flow air filter supports up to 100 horsepower
- Rubber flange gasket ensures a leak-free seal
- Breather kit included for 1993-1999 Harley models
When you're chasing serious power from your Harley, the intake system is critical. This Mikuni HSR 45/42 Total Carburetor Kit provides everything you need to upgrade your Evolution Big Twin, ensuring your engine breathes freely and efficiently. Designed for performance, it supports significant horsepower gains and offers reliable operation.
Engineered for Maximum Airflow
- High-flow air filter designed to support up to 100 horsepower
- Special intake manifold optimized for performance gains
- Rubber flange gasket for a secure, leak-free seal
- Includes breather kit for 1993-1999 Evolution models
Simplified Performance Upgrade
This kit is engineered to be a straightforward installation, providing a noticeable performance boost right out of the box. While manifold clamps and seals are sold separately, the core components are included for a robust upgrade. For 1984-1989 Evolution models, you'll need to source 1990-1995 model year cable assemblies to complete the swap.
Specifications
- Brand: Mikuni
- Manufacturer Part #: F45-3
- Length: 8.9 in
- Width: 16 in
- Height: 5.7 in
- Weight: 8.36 lbs
- Country of Origin: Japan
Common questions
What is included in this Mikuni HSR Total Carburetor Kit?
The kit includes a Mikuni HSR 45/42 carburetor, a special intake manifold, a rubber flange gasket, a high-flow air filter, and a breather kit for 1993-1999 models. Manifold clamps and seals are sold separately.
Will this kit fit my older Evolution Big Twin?
Yes, this kit fits 1984-1999 Evolution Big Twin models. For 1984-1989 models, you will need to source cable assemblies from 1990-1995 models for proper installation.
Does this carburetor require a special air filter?
This kit includes a high-flow air filter specifically designed to work with the Mikuni HSR carburetor and support its performance capabilities.
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 | 14-2021 |
| WEIGHT | 8.36 lb |
