How small is the 125cc bike?

Yes... a 125cc motorcycle is very small. As a matter of fact, a lot of scooters these days are much bigger. I am uming he can only get a 125 because of the licensing procedures in some countries, not sure about Norway. In certain countries you get a license for a certain size bike for a certain amount of time, then your allowed a license for a larger bike... am I thinking right? Unlike the US where they will let any idiot on any size bike. But to answer your question... Yes, he will dwarf the bike, and I hope he is in no hurry to get anywhere... Even 2 cycle 125 cc motors, set up to race, and can be very fast, only produce a certain amount of HP (horse power). Every 7 pounds of weight on the motorcycle robs one horse power... and even a race ready 125cc motor would put out less than 10 hp. Yes, it's a very small bike... Hope this helped.