2 6V 0,3A solar panel in series
1 diode 1n5817
1 electric motor 270KV or lower, KV means rounds/(min Volts)
1 watt's up meter
2 10Ah 11,1V lipo batteries
1 Lipo charger
1 ESC 200A with BEC
1 Servo tester
The system work at about 12V because there are 3 cells, but i think it could also work with only 2 cells so at 7,2V, but the solar panel value should be changed.
After have fixed all parts with silicon on the bike and fixed the motor with nuts in a iron soldered support you should have something like this in pictures.
You could also charge the batteries with a normal lipo charger.
Hope you like it, have fun! :)
more info at http://elettroportale.altervista.org/Bicisol.html