We are cruisers on our sailboat and keep two Mantis 1's in bags on deck, breaking out the mopeds when we get to a new port. Both have just short of three thousand miles on them without failure save the following.. one coil, one set spark plugs, remove boil and replace carb's on both units. Except for the replacement parts required after my wife who was behind me failed to stop window shopping and notice that I had stopped ahead for a red light.