This depends upon which state you are operating the motorcycle in.
There is no minimum age requirement to be a passenger on a motorcycle in PA. The only law is that a child must wear an approved helmet.
Minimum age is 16 years.
There is no age minimum in TN
If you have the money, any age. Riding it is a different matter
You can learn from as young as 13
there is no age requirement inPA
I believe it is 16.
At age 15 (sometimes 16), you can apply for a motorcycle learner's permit, in most states.
There is no age restriction
In Alaska, the minimum age to obtain a motorcycle learner's permit is 16 years old. However, individuals can start riding with a motorcycle instruction permit at 14 years old, but they must be supervised by a licensed motorcycle operator. To obtain a full motorcycle license, riders must be at least 16 years old and complete the required testing.
13 or 14 I believe
England does not impose an age limit for riding pillion on a motorcycle so long as the driver holds a full driving licence for two years.