how nice to see mention of the wonderful side valve sunbeams.there cannot be many reading this who have ridden or even seen one.but i started racing on a 1928 longstroke in 1953 at silverstone saturday.it was an amazing bike but i would have preferred a model 90.but that was out of reach.coming back from a rally in reading,and going quite fast a model 90 caught me up had a word and then said i must go and disappeared in the distance.now where is r cordon champs great book,i must read it again.