Sorry Ken, I imagine they are no good for restoration, the aluminium of the carb bodies at the inlet on two of them has corroded very badly indeed. I am not sure how, they came like that in a job lot of spares. Strangely the throttle mechanism is in very good condition, even the chrome part but as I said the carb bodies are scrap. Luckily the float chambers are good and I have already needed to fit two of them to my bike as every now and again the brass tubes split, probably down to ethanol in the fuel.