Here's a breakdown of the acronym:
* FL: This is a Harley-Davidson model code that designates a touring motorcycle with a full fairing.
* HT: This code specifies the specific touring model - the Electra Glide.
* PI: This abbreviation refers to "Programmed Injection", indicating that the motorcycle uses fuel injection technology.
Therefore, FLHTPI is the model designation for a Harley-Davidson Electra Glide equipped with a fuel-injected engine.