The water was about a meter, was nearly at my exhaust at one point.
I'd question a meter....even a dual sport with a 35" seat height could not handle water a meter deep ( 39.x " )
as the air intakes are generally under the seat.
The exhaust height does not matter as long as the engine is running.
It's the air intake that is the key - the guy in the video had his snorkeled up to his handlebars and above.