M900 1997 Won´t start

Hi there,

Got a M900 from 1997 and have a problem with that.

I changed the oil following the manual (3.9 liters) but it was too much and i put only 3 liters. Ride it 2 times, and in the second time she stalled. I took the air filter and she runs again. The air filter was full of fuel and i tried to wash it the best i could with water and soap (it is a KN) but after that she worked one more time and then stalled.

PS: In the meanwhille i took of the oil in excess and now are in the right volume.

After that my battery went dry and i charged it again but the bike just don´t start even without the air filter in it. Did it damage the motor? Did i drowned the bike and just need to change the plugs? Need help folks

If are anyone from Portugal that could help to i would appreciate.

Thanks