I have had a Recon float but that was when nobody was on it. When I go in water that is deeper than the seat, i pull a wheelie and i can go into deep water.

 

my old ATC125M would float, we used to try and sink it but couldnt. We would go swimming with it in our pond back in the 6th grade and climb onto it and roll it over upside down then back upright and give it a pull to fire it up and in 4th gear would make its way (throwing a awesome roost) to land. Dad didnt like the water in the wheel berrings though