I would put on centerstand with a block of wood or piece of rubber matt under each wheel, keep the tank full with the treatment for ethanol gas and try to start it when you could. When you start it let it warm up to operating temps and try switches to lights and such. When you walk past it work the controls a little. Foot and handle bar brakes and clutch and roll throttle to avoid frozen things when you start to wake it. And tell him and his family thanks. I think this is as hard for the family as those that do this great service for us.