Yep,it`s true,unleaded goes off really quickly,so much so that it won`t even smell anymore (insert crude jokes about underwear or socks..).Same for engine oil,it breaks down over a period of time,especially if previously used prior to storing the bike,and definately if subject to extremes of heat/cold/damp ambients. That`s why service schedules have a mileage/time interval.Not sure about gearbox oil,think that`s ok.Remember that yer brake fluid is hydroscopic (fink dat`s the word) and is likely to degrade quickly in cold/damp.Keep yer tyres off the ground.Lube all pivot points well.Dunno about the other battery gizmos,but I have four bikes,two of them are for occaisional use,and they`re all hooked up to OPTIMATES,(three version 2,one version 3)and they all leap into life when required.The only snag I had was when I had a red LED on one and thought it was because I had knocked the plug but in fact the electrolyte level was low on the battery.No surprise after 7 months really! Keep the bike covered,yes,even indoors(the inexpensive Oxford "dormex" cover is fine in a dry garage/shed/barn).Finally,give the bike a bloody good check before use;especially yer brakes...Hope this helps.