Whatever the exact providence of the machine, and even allowing for the fact that Dave never raced (at all, let alone the TT), it seems the best way to honour the memory of arguably the most popular/best motorcycle racer of all time, so please, let 'em alone?
It is surely a lot more worthy than what I saw in the "Lap of Honour" on my last visit - soap opera actors on road bikes allowed to ride with people who really deserved honouring - sheesh!