I'd like to know too.
Div2 Southampton won all 4 of their matches, the last of which, v Brum (48-47) on Sept 18th, was scheduled to be their last home meeting of the season. It was billed in the previous week's programme as the 'final divisional decider' but curiously little was made of it in the actual programme!
I was about to add Ronnie Moore who had 18 seasons at Wimbledon but it seems that he also rode for Coventry in 1974, something that I was hitherto unaware of.
Obviously I was being facetious but I don't want that particular fact to be forgotten.
With regard to modern 4-valvers, I don't think the number of valves per se is the issue. Weslakes and first generation Jawa 4-valves really didn't seem markedly different to the 2-valves (they sounded similar and track records were not being obliterated for instance) and still suited the tracks of the time. It's the evolution of them into the high revving laydowns that aren't suited to current tracks that sees us where we are now.