change all oils. leave on mainstand with both tyres off the ground. Either remove battery & leave on trickle charge, or trickle charge on bike. (I wouldn't feel happy with it on charge for a year on the bike)
Is in a damp free storage?
Petrol? I'd be inclined to disconnect the fuel lines, and run the engine to clear the fuel from the injectors & associated plumbing, so that that the petrol can't go off in there.
Then either fill it up with petrol and add a preservative, this will lessen the chance of any water moisture condensing into the tank. Or empty it completely, and leave the tank open, to breath. Not sure which is best, but do not leave half a tank of untreated petrol in the tank. There my twopenorth.
Before all this, go for last ride. let bike cool down, wash and dry. spray with your favorite anti corossion product. Kiss bike goodbye
Of course he's right, I'm pleasantly surprised that for my error, he didn't inform me that I should...................... Go do one The rest of the advise was OK then? Mr. Steptoe, Sah!