as has been said, the NMM do try and run a lot of their bikes. certainly the race bikes are being used fr parades and at classic track events, but we have to remember that this is essentially a private collection and the rebuilds and restorations of the bikes are funded by the owner from the income of the museum and his own pocket. i think that since the fire, its been a bit more important for them to not just have static displays, but they have a lot of bikes there and once you have rebiuilt something to keep it running, the work doesnt stop, you have to keep on top of it and keep it maintained, so every newly built bike that they fire up is another plate spinning on a stick, whenever you get one up and spinning, you have to go back and re spin the others a bit more. at what stage do you run out of the funds to keep rebuilding refurbishing and restoring an ever increasing pool of bikes. but any museum is going to be a bit of a morgue, for those who remember these bikes in their day, well, you might want to see them running round, but for folks like me born into the era of japanese bikes, its nice to just see them actually in the flesh, if they run, then thats a bonus. of course, folks who want to see more of them running and being ridden can always dip their hands into their pockets and chuck a few quid towards it, but complaining that the countrys biggest bike collection doesnt have enough bikes running is a bit daft, i struggle to keep more than a handful of bikes running at the same time.
as for the originality of the molten metal pool bikes, well they arent kidding anyone. its not like they say that the bikes are original, and we all know about the fire and its destruction, if they can rebuild a bike thats been severely damaged by fire like many of their bikes were, then i think its to be celebrated that they can get them into any sort of running order. ok, it might not be the original crankcases or replica bodywork, but tbh thats not a problem to me, there are very few bikes, particularly race bikes that are still original anyway. i still want to see these bikes cos they are as close as we can get to the real thing if the real thing has literally gone up in smoke.