A coworker is buying the motor I got and is putting it in a quad.

 

100% street legal my ***! In my state your wheels/tires must be covered. We get harassed with Jeeps that don't have enough fender flare.
Example, this would get you pulled over in Pa:

 

That is pretty neat! To bad it looks too.... happy? All it needs is a set of Ronal Bear wheels.

I bet it would be an absolute blast to drive though! I like the K.I.S.S. rule behind the whole vehicle.

 

But is in not in your state and in his state of AZ it is legal, as are golf carts, and ANYthing else you can hang the required equipment off of. You literally can street legal almost anything in AZ, 3, 4 wheel ATV, go cart, golf cart..anything.

It is a toy no doubt, and 850lb running power through the VTR transmission is a pile of broken parts just not yet made.
But hey, when it's just time you have lots of and beer to build with a pile of spares in the garage corner, some odd DOM tube drops from another build, and a tubing bender gathering dust in shop.... Heck ya build a toy from crap you have laying around.