Mine was getting harder and harder to start til I removed the tip over valve or whatever its called, it was pretty much blocked. If I open the gas tank it helped. Don't know if this is related or not but I thought I'd throw it out there.
heh, yeah, i had the plugs out once already. if you know how to pull them without removing the air box i'd sure like to know!!!crashmasterd said:4) Have you checked for mouse nests or other obstructions in the airbox?