Yes, you are required to have a motorcycle endorcement to ride a motorcycle with a displacement of 50cc's or greater.
50cc - 600cc
Yes, unless their engine is smaller than 50cc
The speed of the engine is defined as the maximum revolutions per minute of the crank, which would depend on engine design. 50cc chainsaws can rev to over 14,000rpm. The maximum speed of a vehicle with a 50cc engine would depend on its weight, the gearing, the fuel and the environment it is being ridden in. It is possible to tune a 50cc engine in a motorcycle to go over 100mph - but at the cost of engine longevity.
Yes, anything over 50cc you need a motorcycle endorsement or license to operate a motorcycle in the state. Anything under 50cc you have to have a valid drivers license or motorcycle license to operate in the state.
yes you can as long as you are not blocking anyone.
As long as it is under 50cc, no; your "50cc" is almost surely actually 49cc, thus conforming to this law.
50cc or less.
Nope sorry, you have to have at least A1 category to drive 50cc
50cc
Over 50cc to 125cc
Most states require insurance if the motorcycle is to be ridden on public roads.