As long as your carb vent is re routed to under the seat and your airbox remains stock, your fine on pretty darn deep crossings.
If your so deep so as to intake water......hmm. Best to avoid. Might want to have a kickstart if you don't already. A little silicon dielectric grease applied
to the spark plug boot wouldn't hurt to keep water out. Don't forget to clean out n lube cables, chain after submergence.