I can ride a bicycle and have also been on the motorcycle. Huge difference for me. I know the physics are the same, but with a bicycle, you're dealing with two brakes (both controlled by your hands) , the shifter, controlled by hour hand, and pedaling. With the motorcycle, the same four limbs are involved, but reaction time must be quicker, and the weight is definitely different and there is that hand brake and the foot brake thing going on, and the foot thing with the shifting. There is much more going on, for me, on the motorcycle. Left foot, right foot, throttle, brake, etc. Four different limbs doing four completely different things. Because of the speed of the bicycle, reaction time doesn't need to be quite so quick, either. I know it is hard for you to imagine because it is second nature to you (and I think to men, in general), but for me, it is much more difficult that a bicycle. JMHO.