By law in most states and provinces, it is a motorcycle. To some people, it is a trike because it has three wheels. To an engineer, it is in a category by itself...call it an inverted trike, reverse trike, or tadpole trike, if you like. I don't consider it to be a motorcycle any more than I think of a top fuel dragster as an automobile...it is related, but different. I don't think of it as a "roadster", either, since to me that is an automobile with a soft top and window curtains. It's just my Spyder...also a misleading term since there are several autos with that moniker. Call it what you wish. The name isn't important...just the fun!