I think the wide hole and 3 bolts is for the Kirby LV-30 4 Stroke engine.
He has showed me the badge that he said he
thinks is from it, it was sadly just a normal Victa Special, but i have asked him to get pictures of any other badges in that same style just in case.
The base looks very similar to a Victa Special model 3 and so do the handle bars, The height adjustment looks like it is from or inspired by a Hurricane.
Sorry everyone I added the wrong picture! here is the original.
As you can see the base is very similar to the Victa Special.
Thanks For Reading!Kye.