Yeah you should be able to,
I don't think you need a licence to ride any sort of bike you should just buy a bike and ride it its not like cars where you need licence's because with bikes you can just buy it, ride it as there is no place at all to buy real bike licences. If somebody has told you you need a licence to ride a three wheeled bike you shouldn't have to for ANY bike.
No, is not a car or bike.
yes
yess
no you need a full bike licence
no not until they are 8 and have a special dirt bike driving licence
yes but not on main roads
Yes, there is a limit to the size of quad bike that you can ride on a full UK driving licence. If you passed your car driving test on or after January 19, 2013, you can ride a quad bike with an engine size up to 50cc. If you passed your driving test before this date, you can ride a quad bike with an engine size up to 125cc. It's important to note that these restrictions do not apply if you have a motorcycle licence.
i believe the 700cc quad is the biggest you can ride on the road. not quite sure.
If it is road legal and you have a full driving licence and insurance you can ride it on a motorway.
Most states (perhaps all states) require a separate motorcycle endorsement to ride a motorcycle on the street.
If you're not speeding up, slowing down or turning - then forces are balanced.