Winter Storage

I've a bike on my ramp that's been there over two years and it still starts on the key with what was left in it without having been drained if that answers anything?

 

I would be inclined to put a dollop of Redex, or similar, in your tank and run the engine to get it into the system before stripping it down, just to help keep things clean.
My Trident has a full tank of super unleaded liberally dosed with Redex for over wintering. May even get some fuel stabiliser as well. Never had any problem when I've put the bike back on the road in spring using this method. One year I forgot and the bike went into pop/bang/fart mode after a few miles. A quick visit to Halfords in Selby for some Redex, and the bike was soon back on song. Convinced me!

 

Swear by redex, both my bikes are low utilisation, I switch off the fuel tap and run until dry on the BSA, but as you say, can't do that on EFI bikes.
If not in weekly use I tend to put the optimiser on the battery every three weeks or so, also start and warm up and remove any condensation and damp.
Better still, go out if it is dry whatever the temperature.

 

My boat and jet ski get laid up for the winter, both start fine at the beginning of the season, both fuel injection, skis 1500cc four stroke supercharged, boat 3.0ltr V6 two stroke. Only thing I do is spray a fogging oil into the jet ski charger.
Done this for the last 10 years without a problem.