i'd be willing to bet, your son sank it, dealer seen this, and this is why they wont cover it under warranty !. once its sunk ?, no warranty will ever cover it. you should set your son off to the side, offer him some '' butt kicking '' or honesty ?!..lol. I know for a fact..honda will not cover any new machine once they seek snorkels ?, or trash in engine ?. your best bet ?, buy oem from honda, tear it apart, and fix it yourself. if honda does it ?, well..there goes your sons college funds !..lol. while your at it, MAKE SURE YOU INSPECT THE CONNECTING ROD AT BOTH TOP AND BOTTOM FOR ANY PLAY ??!!.