The carbon footprint for an automobile and motorcyle, once constructed, are really just a factor of their gasoline and oil usage.
For the carbon that is added to the atmosphere during construction, you would need information from the manufacturer and manufacturing process. My guess would be the lighter the vehicle and the fewer the number of parts the smaller the carbon footprint.
If you are looking for an individual's carbon footprint I have a few links. However it sounds like you are focused on automobiles and motorcycles. I am afraid I have no links for that specific topic