Ugh. Drowned KDX's are a mess. First thing to do is take your spark plug out and check it- bet it's got white greasy stuff all over it- that's water and oil mixing together. Kick it over with your hand and if it squirts water, you've got no recourse, IMHE, but to remove the pipe, carb, air inlet, KIPS port cover and flush/clean all those parts out until every indication of water is gone. I drowned my KDX 2 years ago by not covering the pipe when I washed the bike and it took me about 2 hours to get every cleaned out and the bike running again. A few weeks ago, I drowned out in an engine-deep crossing, but THANK YOU LORD!!!!, it started up (barely!!!) after a 15 minute sitting session and carb draining (lay the bike on side with gas on). Good thing, too, or it would've been a 5 mile walk home.....