My Scoot has just had it's 4000 mile service and the technician (they used to be mechanics to us older folk !) gave me some advice about the sump drain plug. He said always to use a socket for replacing so that a torque wrench can be used and he warned me about the low value of the setting. One useful piece of info. was to look for impact sockets as they are usually six pointers, I suspect that they are the ones with the black finish instead of plating.