A tip on chassis identification:
Margay has never produced a yoked spindle kart ( where the bearings are in the frame)
And a second tip:
If the spindles look like that, and they are 1/2" kingpins......it may be a Bandit. (Link or Tripplett)
PRC, Emmick, and Trick all used a 3/8" ID bearing with a 7/8" OD on their frame/bearing models.
Sox used a 7/16" ID bearing with a 7/8" OD...….which could be mistaken for 1/2"