our p50 replicas are classed as tricyles as they are 160kg all up,as they are new cars each and everyone has to go for an IVA (independant vehicle assesment), as a builder of hotrods, unless the cars age can be proved with original documents, reg number, chassis number etc then that too has to go for inspection and would be allocated a Q plate as it is of indeterminate origin/age. the implications of such an examination are many. to include sharp edges, e marked lighting, mirrors ,glasing,etc etc.2 strokes are considerd by vosato be the work of satan and are thought to be the harbingers of armageddon! your local DVLA office will be able to advise on what you need to do, but 1st i suggest you get some practice in at jumping through hoops and going round in circles. good luck.