So, in terms of bar thickness. its 22mm or 7/8″ so be wary of any US imported stuff as its designed to fit 1″ bars unless they otherwise state (made this mistake a few times)
Now switching everything over to a 1″ bar can be done, but you’ll need to get the risers bars and a whole new handle bar controls set up to match, which can be expensive.
As for getting apes you will need to extend the cables. clutch brake and throttle can be run externally of the bar and some poeple will run the electrical wires inside of the bar itself to tidy it up. some bars come with the holes predrilled for this purpose.
Hope that helped