Last year was Dec 1st, the year before was Nov 1st. All depends on the weather. I don't mind riding in the cold, but once they start laying salt, she gets stored. I won't ride on salt covered roads--it's a killer to the bike.
If roads are clear of salt and I have my Klim wear on I am open for it. It is silimlar to riding a sled in the cold but on the road when it is cold. Mind set. But my bike will never see salt.
I rode my rocket every month of the year one year. Took it out atleast once during nov,dec, jan, feb, and march. Kinda scary with the sand on the roads but had to scratch the itch.....