Thanks for the kind words Silverbear, almost been a year since the Simplex showed up on my doorstep...progress has come only reluctantly.
I mentioned Vee Rubber tires a few months ago & I recall Pat over at Sportsman had also ordered a set, but haven't noticed any other mention of them on the forum. I'm impressed with mine & am going with one on the front of the Gator as well, 2.5" x 26" completely fills the Sunlite dual springer. They are double Kevlar belted bead to bead with a third belt down the center. 750lb. per wheel weight rated (no speed rating) & use the "flame tread pattern). They are stiff but mount up easily enough. Weigh in at at bit over 5lb. not lite weights for sure. I'll use the Kenda 3" x 26" on the rear, as Vee rubber doesn't list the wider size.
The "Gator" frame sits much lower than the "Indian Navaho" GT-2, as well as being longer and check out the open space between the tubes. Honda or Briggs V twin should easily fit this frame (without the pedal bracket). Rick C.