There will be disagreement on this but here is my opinion. I ran my cb750 78K for a whole summer on a 7AH battery WITH the electric start in. keep in mind though the sohc bikes still had a kickstart. If you do not have the kicker, make sure your bike starts very easy otherwise you could very easily run that battery flat. Remember, the stock batt was probably around 14AH so this on is a little over half that.
BUT if everything is in good shape AND you give enough time to charge the battery after starting, you should be able to do it ok.
Again, my opinion based on the 78K BUT I almost never use my kicker. Cold starting, my bike starts with barely touching the button.
The ride IS the adventure. The destination is just to get gas!