There aren't any needs for tests or anything before you can get yourself a 50cc manual bike, but there aren't many choices for 50cc manuals, there's only like the aprilia rs50 and a few others. My advice would be:
- If you're 16, get a nice 50cc automatic like a peugeot c tech which is what I have done and get some good road experience and confidence until you can ride a 125 at 17
or
- Get a 125 bike now because you'll have more choice and will be able to find a bike that you like. I wanted a bike so bad but it's a pain enough if you're new on the road to learn what you're doing without orrying about gears.
If u did ur CBT on a manual and are still adamant on getting a 50cc manual, then no, you don't have to do anything else, but I'd recommend going for an automatic first.