My goodness, what a loss, what a shock. Chatting to Mike Steel today, (Mike has one of Keith's Bearts), and he said that Keith had just had a check up in the last few days, and was passed fit.
Enthusiasts like Keith are impossible to replace. Add the fact that he was a real gentleman, and would travel anywhere in the UK to give talks about his beloved sport, and you begin to realise the void that cannot be filled. His Liverpool gatherings were always popular and well supported, a measure of the respect in which he was held by fellow motorcycle racers.
My sympathy to his family, I am so very sorry to hear this news.