Re: What makes for a bike that you can ride no hands
the most common cause is the headset is too tight. riding no hands requires you to shift your weight back and forth to bring the front wheel under you. if the headset is too tight, it'll stick, and won't react to the shifting weight.
bent forks suck, too.
it's mostly in the steering. a long chopper will be slow to react, while a sharp fork rake will react too quickly. this could be the head tube angle or the fork, or both.
but like i said, the most common, and the easiest to fix is the headset.