* Keihin CV40: The Keihin CV40 is another good carburetor option for Harley-Davidson Night Trains. It provides similar benefits to the Mikuni HSR42, but it may be a bit more difficult to install and tune.
* S&S Super E: The S&S Super E is a high-performance carburetor that can provide significant gains in power and torque. However, it is also the most expensive and difficult to install and tune of the three carburetors listed here.
Ultimately, the best carburetor for your Harley-Davidson Night Train depends on your individual needs and budget. If you are looking for an easy-to-install and tune carburetor that offers improved performance, the Mikuni HSR42 or Keihin CV40 are good options. If you are looking for maximum power and torque, the S&S Super E is the best choice.
