While I wouldn't recommend over ~30mph on a department store bicycle without getting into bigger upgrades, with the correct hubs/wheels/frame/brakes 60mph is not much. There are cheap Chinese mopeds do that completely road legal and safe.
If I was even thinking of a 212 predator build, it wouldn't be on a cheap frame and I would be looking to do at LEAST 50mph and register it. If not then you might as well just do a 2 stroke with a few mods and a shift kit and not deal with the giant heavy motor and all that torque.
In my opinion a gx120 would be better it’s only a little bigger than a 79cc and it can probably go 50 with some mods. I got a 212 for a mini chopper project though it will be faster than my 2 stroke bike I’m sure.
Suzuki DR 200 is an OHC with high compression ratio and big valves and performance cam timing. You could expect to get at least 18 hp or more with proper engine tweaks with a DR200. The 212 cc industrial engines are hard pressed to make over 8.5 HP in stock trim with a very restrictive carb and conservative sized and timed valves.
My 125 cc pitbike clone engined Honda makes 11 hp.
I used to be able to hit 30 when I was young and speedy. Today I need the engine to do that.
Of course, back then Walmart was two stores in Arkansas, and Chinese bikes stayed in China. Bikes were more expensive and built a lot better. The Breaking Away guys who ride road bikes aren't doing it on $60 bicycles.