My plans for building a hybrid electric scooter.

I will be using a 1000 watt 36 volt DC drive motor as a generator that I got from a E-ZIP 1000 made by curry.  I will be turning the generator with a 30 CC gas motor running on propane.  It will be charging three 12 volt batteries wired in series for 36 volt.  I then we'll be using a 36 volt controller that will be running a 300 watt high torque brush motor with chain drive to rear wheel.  I will also be installing capacitors for starting storage for the Electric Motor.  I have several questions that I need answered.  Number one, I know I will need to install a diode between the generator and the batteries, what type of diode do I need, how many amps should the diode Be.  Number two what should be the ahr for the batteries be.  Will 7 ahr battery work, or should I go larger.  What voltage should the capacitors be and what should be uf number Be.  What gauge wire should I run between the generator and the batteries and the batteries to drive a motor.  The voltage for the rear drive motor will be 24 volts will this be a problem?  In theory I hope to have a Gas Electric hybrid scooter that will be quiet and have the range of the gas scooter.   How many amps will I need for cruising speed?  With the proper gearing I hope to have a top speed of 40 miles per hour and fast acceleration.  My father who is electrical engineer but he's 91 years old has been helping me with this project.  Like to know what you think, will it work ??  Need some advice or little help.