Need to know licensing?

Question

i live in st george utah i need to know if a vehicle under 50cc needs insurance and a license plate to be riden and this needs to be known in the state of utah only

Answer 1

Registration depends on weight.

What Vehicles Must Be Registered?

All cars, snowmobiles, trailers over 750 lbs., motorcycles, boats, trucks, campers and off-highway vehicles used in the state of Utah must be registered. Trailers weighing 750 lbs. or less when empty do not have to be registered. However, any trailer may be registered for your convenience.

Now the question is, can you ride it on Utah's roads, and there doesn't seem to be an answer to that on the web page.