Motor skills issues are sometimes, but not always, part of the package with people on the Autism/Asperger's spectrum. I did take longer to ride a bike, but eventually did learn. There is a certain angle of leaning back that really makes me feel unbalanced, like I am going to fall, even if I am sitting down. I have some minor hand skill issues. I have slightly turned out feet, so my walking gait is awkward and unsteady. It was made worse when I put on a lot of weight, but I compensate by walking slow. I did take dancing lessons for a while as a child, and I think that helped a little, too, but that was a long time ago.
The Autism/Asperger's spectrum of disorders is made up of a number of different symptoms, and it is not necessary to have all of them to be on the spectrum. I don't have all of them, but I do have a lot of them. It's hard, but at least now that I know what's wrong with me, it's easier for me to deal with it.
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If a man does not keep pace with his companions, perhaps it is because he hears a different drummer.
Let him step to the music which he hears, however measured, or far away.--Henry David Thoreau