Ahhh, you washed it....thats why. The banshee is very sensitive to water....A lot of us have tried to figure it out, be can't put the actual finger on it...The stock carbs get hit w/ water and the shee won't run for shit for a awhile....You could also check to see if the air filter is wet....If the filter is fine, then run the shee until it warm, then shut it off, start it up about 10 minutes later and it usually comes out of it....Do a search on here. There was a BIG discussion on this..