Harley Davidson abbreviations don't always follow a pattern. For example, the abbreviation for the standand Road King is FLHR, and FLHT for the standard Electra Glide. The abbreviation for the Electra Glide police version is FLHTP. That makes since because the letter 'P' is added to the standard abbreviation to represent the police version. However, the abbreviation for the Road King police version is FLHP. Why doesn't the Road King police version have an abbreviation of FLHRP?