NOTE: I'm not an expert in what to do with a bike that's been sitting for a year. I'm just trying to list common things.
Before the first ride:
-Charge the battery
-Empty and replace the gas
-Check tire pressure and inspect for dry rotting
-Holding the front brake, compress and rebound the front a bunch and check for any leaks coming from the fork seals.
-Spin the rear on center stand and look/listen for binding chain links
-Check all lights
During your first ride:
-Take it slow... the tires and your skills may have atrophied
-Make it short... ride around town, get it fully warmed up, then return for a post-ride check (again, for leaks)
After your first ride:
Change the oil.
Replace other fluids? Depends again, on when they were last changed.
There will probably be no real problems, but it's better safe to check these things out, than sorry you didn't. :thumbup:
Thank you for your service and welcome back.