I thought if you drained the bowl completely the seals and stuff can dry out? It needs a coating of the oil and fucl to keep everything from drying out.
Thoughts on this?
First, of course, is that there is no oil in the fuel on a four-stroke. The truth about seals drying out is this:
When many of the different rubber compounds used in carb seals are exposed to fuel in a long term scenario, such as weeks on end of being immersed in fuel, certain components of the fuel will soak into the rubber, often swelling it very slightly. If this goes on for a while, these fuel chemicals can dissolve and replace some of the components of the rubber compound. Then. if the fuel is taken away for a significant length of time, the fuel evaporates out of the rubber, and it shrinks or dries out and cracks, or both.
The way to avoid this is to start with all brand new parts and never store it, even from one day to the next, with gas in it. That will prevent the fuel from being absorbed by the rubber in the first place, so that it cannot then dry out of it.
Alternatively, keep it wet with fresh fuel.
Not sure how this will play out with an EFI unit, but I don't think it will be a problem. Might ask some of the guys in the sport bike forums who live in the northern states if they've had trouble as a result of storing them.