In this day and age of text messaging people using the phone have to be able to abbreviate and read abbreviations. This is not a new concept. Back in the dark ages when I started riding we had (and still do) some organizations that when you heard them you knew what they were. Like the FBI, DEA, ATF, DOT, CHP, and CIA. Usually when the USPS delivered a letter from one of these you figured it was BS.
But Harley riders have been dealing with lettering systems for many years. Again back when I started riding we could chose from an XLH or XLCH; an FX or FXE; an FL or FLH; a G or GE plus there were the lightweights SS350 and SX350 and a few more. Previous to them H-D had the UL, ULH, EL, WL, WLA, WR, XA, K, KH, KHK, KR, KHKK, etc., etc.
Now some of the lettering designations are almost as long as the models names. It starts out easy enough XL883, XL883S, XL1200, XL1200S and XR1200, they’re all Sportsters. The Dyna’s aren’t to bad either with FXD, FXDWG and FXDL. Trouble starts in the Softail models. You have the FXST, FXSTB, FXSTD, FXSTS, FLST, FLSTF, FLSTC, FLSTN, FXSTS, FXSTSB, FXSTSC, FLSTSB, and FLSTSC. Touring models go by FLHR, FLHS, FLHX, FLHP, FLHT, FLHTC, FLHTCSUI and FLT. The V-Rods get VRSC, VRSCA, VRSCB, VRSCD, VRSCR, VRSCSE, VRSCX and VRXSE.
As you can see you can go crazy just looking at the lettering, plus you can add more letters. When you order CVO bikes they get SE added on. Be sure to specify when you order a FXSTS. It could be a Softail Standard or a Softail Springer. BTW LOL (lots of luck).