Hi all.Today I rode up to the local store about a 1/2 mile from my house and when I came back out to ride my bike it would not start.I had about a half tank of gas left before I left home to the store.So I had to pedal back home and I checked my gas tank and there was just a little drip left in the tank,there was no spills anywhere nor when I filled the tank back up and tried starting it up.I checked the spark plug and it was very oily although it still has a good spark.I've also tried different spark plugs with no luck.Note: I drilled a few holes into the carburetor air filter housing a few days ago,Could that have anything to do with it? When I try to start it up it will rev but won't turn over.From little experience it sounds to me like it is flooded..Any help here please? Thank you.