I can only speak for Hobie yaks. After each trip, in salt, you should wash down the yak and mirage drive. I do not oil the mirage drive each time, but I can tell when a light lub is needed.The rudder lines are almost maintenance free, but on occasion I will adjust and tighten the lines. Only when needed.
Hope this helps. Not much to take care of on the Hobie yaks.
Good Luck and happy yaking.