[Flip]

Something doesn't sound right there to me- my 1997 900 can easily be left two weeks or more without being on charge and still start ok and that's with a seven year old Motobatt.

Especially since I replaced the fuel pumps and hoses so the carbs fill quicker when the button is pressed.

But clearly you have an electrical issue to begin with, so I would certainly start by going through all the electrical connections (particularly the grounds), cleaning them up and putting them back together with a little Silicone grease- same goes for all the fuses.

As these bikes get older they do need a little more attention to keep them happy and it is things like this that get overlooked and will end up failing when you're out miles away from home which is why I went through mine and replaced the starter and ground connection leads a couple of years ago- it spins up a lot quicker since doing so meaning less pressure is put upon the somewhat marginal charging system.

I will start mine up later and take some readings for a reference for you.