Hi, I recently acquired my grandfathers old 3-wheeler. It is a mud bug?? Has anyone here ever heard of these? I have an extra green body but it has an original orange body on it now and what appears to be the original ski for the winter. It has some sort of newer honda engine in it. Could anyone tell me what engine this machine originally came with? or what year mud bug this is? I believe they were made from 1971-1973. Any info at all would be greatly apprecited.