When working on a new project its always a good idea to plan ahead, its easier to build around parts you have then to find parts that will fit what you have built.
This is a preliminary list of components for the helmet display and where to find them.
Head up display (Receiver part in helmet):
Arduino Pro-Mini 3.3V
Example of an Arduino Pro-Mini with USB programming attachment 3.3V Atmega 328
Adafruit OLED display board
XBEE wireless receiver
Will need 2 of these as one transmits from bike and the other receives data in the helmet mounted OLED display
USB Lithium battery charger (for helmet mounted OLED display module):
LiPo battery for helmet mounted data display:
NOTE: Circuit diagrams and details of transmitter section within the main bike will come later as we build it into the bike.