With petrol still being in the tank it gunked up the petrol tap, tank breather pipe, and had continued to slowly seep through the carbs, the middle one was by far the worst, Bruce gave me a spare set of carbs, I assumed they were the correct ones for the bike, I only fitted one to replace the very bad  (corroded) middle carb, 
 
	It would/could have been a different story if the tank and carbs had been drained.