So now I have a question. When everyone refers to starting a bike with compression release they always mention top dead center. Now when you think about it, isn't the crank/rod/piston actually at bottom dead center. Compression is made from the piston pushing up on a chamber of air with no escape, in order for it to be pushin up it has to be at the bottom. Is my understand of this term (tdc) wrong?? Am I missing something??? I think top dead center is really bottom dead center!!!