What is the speed limit for a Class A motorcycle (unless indicated otherwise by any traffic sign)?

Why this is the answer

The correct answer in the official bank: 50 k.p.h on an urban road and 80 k.p.h on an inter-urban road.

When no sign says otherwise, a Class A motorcycle may ride at no more than 50 k.p.h on an urban road and 80 k.p.h on an inter-urban road. These default limits apply automatically, but a speed limit sign can change them. They are maximums, not targets, so adjust your speed to the road, weather and traffic. Riding at 80 k.p.h in town is far above the allowed limit.

Topic: Rules and regulations. The bank marks it for these classes: Motorcycle (A).