Why wont my ducati start? i have a 2005 ducati ss800. I cant get it to start. It cranks for a while and tries?

why wont my ducati start?

i have a 2005 ducati ss800. I cant get it to start. It cranks for a while and tries but wont start. i didnt properly store it for winterization, which i now know. The battery was low so i charged it up and I am sure it is ok now. I didnt have hardly any fuel in the tank while it sat for about 3 months ( maybe half gallon ) I put new gas in and even put in fuel injector cleaner. I tried to use some engine starting fluid that I sprayed into the intake but nothing. I do not know a whole lot about bikes and maybe should but I want to try and figure this out here instead of having to put it on a truck and driving 2 hours away to a dealership. It was running great before it sat for so long. Is there any thing you can think of to help me?