voltage

Hello! I have a 1/8 hp motor that we were hoping to use as a generator. It is supposed to turn at 810 rpm when supplied with 230 V and 2.7 A. When we spun it at 810 rpm, we only got 4 V though. Are we doing something wrong or is the motor defective? Or does the motor not respond the same...

Why would anyone buy an electric bicycle for $1,500-2000 when they could buy a nice store bought gas powered bicycle for around $600 or 700? Or if they felt so inclined they could spend $1,500 and get a really great gas powered bicycle. Legal issues? That's the only reason I can think of.