[Darren69]

It does appear that the early F1 750 had a cantilever rear like the TT2 and most SS models and had a parallel arm then at some point the later F1 750 developed the rising rate rear hoop ala Monster and the arm was angled and no longer ran parallel so I think the rising rate linkage may account for the change? Maybe only half the counter was needed since half the forces are being transferred, so the angle was changed to account for it? My 750SS had the rear setup like that but I can't remember how it was exactly. I'll have a look to see if I can find any pics of 900SL's