Put stabilizer in your fuel and let your engine run for a bit, prep your sled for mice, plug your exhaust, but sticky traps on top of your track and in your engine compartment, moth balls work good, grease all your grease fittings, I use a water proof grease, like a marine type, under coat your rear suspension and front suspension be generous, I use rust check green can, blow out your clutches with some compressed air and wipe down the belt dust, I also spray wire connectors and wires with undercoating, keeps them from ozone hardening and mice hate it, some owners change there oils for the summer prep but I change everything in the fall prep, keep your battery charged up, I use leather care for my seat, give your machine a good washing and put some sort of protector on it like some Armor all or what not, some owners raise the front and rear for storage, but where I have front and rear air shocks I leave the pressure on them, store in a dry place out of the elements, that's all I can think of.