In order:
Speedo? It resets everytime you ride.
yes
no.
Speedo? It resets everytime you ride.
yes
no.
why disconnect the ground?I just leave mine in the bike and disconnect the ground.
Yah, it fouls the plugs. you dont need to start the bike, just put fuel stabilizer in and out a blanket over her.The bike constantly drains a little in storage with the newer electronic bikes even if it's just to keep the clock working. Also if you store your bike in a cold area you're better off taking the battery in where it's moderately warm but not hot (like not by the heating system).
Nursebiker, you may want to alter your start it every two weeks deal. That actually is far worse for the bike then just letting it sit. It's been covered in the past. Try a search on "winter storage" for some reading.