help needed please!!

[momma_iloveyou]

hi there, i brought my son a ktm 50 2003 mini adventure yesterday, i put clean atf in the clutch ( as told by my local ktm dealer), and the bike was fine, i took my son out today and the bike ran fine till just before coming home, he rode through a puddle and the bike just died on him, i thought it was out of petrol as it wanted to start but as it was time to go home i loaded it in the car and headed home, on returning i jet washed the bike put in more petrol it started and stalled straight away, it did this a couple of times, now it just wont start, there is a drip from the petrol overflow that is red and i assume it is the 2 stroke oil!!
any ideas on wat it could be???
thanks in advance ( i now have a upset son because his bike wont start!!).

[CRider400]

Maybe when he went through the puddle, a little bit of water got in the airbox and the carb sucked it and caused it to die.