In stock form you can ride the crap out of the rincon and not worry about to much. When you start doing some mods such as air filters and exhaust you will need to rejet the carb. You may want to tell him to run the two vent lines off the carb up into the gauge pod. That will help when going into moderately deep water. Tell your buddy to check out rinconriders.com. He will find everything he ever wants to know about his Honda on that site.