We had a mild winter here in Iowa last year and the bike never sat for more than a few weeks. So all my winter prep consisted of installing a windshield and lowers

The year before she sat for two whole months without hitting the road. A little stabil never hurt anything, but every week or so (When the wife wasn't home to wonder what the he11 I was doing)I did open the garage door, roll her outside a little, start her up and sit there for several minutes listening to her.