We have a winner!!

[A-BCD]

Wot, like kawasaku ?? Rudge had 4-valve heads and finished 1-2-3 in a 250cc TT a long time before Hondi

 

[ET43]

Wot about that H.R.D. bloke who won a 500cc race on a 350. Look what that lead to! ET43

 

[Bracker1]

Was that followed by the movie, "The World's Fastest Rudge"..... I am pretty sure all the relevant bike races for the past 30+ years have beed dominated by the Japanese. Thankfully King Kenny raced a Yamaha and not a BSA,or else we would have never had an American Champion.