If you river cross alot take the ones from the side of the carb and move them to the airbox, those ones are breathers as well as overflow. If they suck up water your bike will bog down and maybe shut down. The one coming from the bottom of the carb is the bowl overflow hose, that's the one that stays sticking out of the bottom. If you have a case breather I suggest moving it as well. Leave the radiator overflow hose, don't want coolant in your air box when the radiator boils over. Just some precautions.
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