if l have a CBT can l legally ride a 50cc motorbike on the road

you can at 17 if you have a provisional driving license

Yep in the UK, do not know about anywhere else.

Depends what state you live in. VA requires a license.

You really have to check you state laws. It is different from state to state. Some places require you to have a license and others just a permit to drive it.

That would depend upon your state of legal residence. Best to check with your motor vehicle/license authority than here.

Check your state laws because its different from state to state. Here in IL you would be able to drive it on the road. We have a lot of kids in our town that drive mopeds.

Yes, as long as you have a valid license, have passed the CBT, display L plates and are insured on the bike.

Where do you live? What do the provisions of your license stipulate? Check that, it would say.

Once you pass your standard motorcycle test you are restricted to machines of 25 kW (33 bhp) with a power to weight ratio of 0.16 kW/kg for two years. (On the road)

you can ride a 50cc at the age of 16 geared or not geared its your choice aslong as its no more than a 50 :)

Yes you can. You can ride anything up to 50 cc and it is your choice whether it has gears or not.