Breedlove was correctly classified by FIM as a thrust powered 3 wheeled cycle and never a side car.
4 or more wheels in contact with the ground is defined correctly as an automobile and not a car or a truck , or a bus.
A bit of more detail on the UG/UF.
Lattin represented an entrant that made a V-twin from a segment of a V8 at the now gone MC tech interest meeting that I chaired at Bonneville.
Mad Max, that some of you know built one like it for a Dragbike some years prior.
My input was to put the wishes of the assembled group into words that could be almost universally understood, and printed for all to read after suitable approval by the SCTA Board.
The only person to speak against it after it was agreed it was to be applied to streamliner only was Mark Lingua , who felt that it would open the flood gates to F-1 motors for example and ruin it.
He was not aware that FIM already allowed it but nobody did it anyway.
It was written as approved by a show of hands and subsequent approval by SCTA.
Not long after, it crashed and the builder made it into an automobile.
Nothing has happened since.
Their is no reason to only allow them in the largest sizes and smaller engines like snowmobile and Jet Ski should be allowed across the board in streamliner.
If the entrants vote to do something else, they should be heard and allowed to do it within the bounds of safety.
Rulers and rules should be a careful evolution so as to not obsolete those that have gone before but really beat them because you went faster
You should be extremely careful going forward because it will always be worse if you have to back up from an error, as we have seen again reciently.