Each country is slightly different but the motorcycle licensing rules in most of Europe are generally as follows.
Up to 125cc displacement is A1 or small motorcycle license. There is also limit to power (about 15hp) and power to weight ratio. In some countries you sort of get A1 license with your drivers license (B), but have to activate it by certified training.
2 years after getting your A1 license you can take your A2 license. That gives you license to ride up to about 40 hp bikes.
2 years after getting your A2 license(or over 24 years old) you can take your A license . That gives you license to ride any bike.
In some countries up to 125cc bikes are not allowed on highways.
It's so funny when people say. "125 is good, but if they'd only made it 160, I'd be interested." Then it's "160 is good, but if they'd only made it 250 I'd be interested". Then it's "250 is good, but if they'd only made it 300 I'd be interested". Then it's "300 is good, but if they'd only made it 500 I'd be interested".
