Originally Posted by markk53
I don't know about the single shock, all the big twins from the forties and fifties had TWO shocks in there. Fact is every one I've seen with original frames had the triangular swingarm with twin shocks.
There were two shocks in there side by side, but being so close together, effectively they were the same as one heavier one. Phil Vincent built HRDs with that setup and bought in Rudge Python and JAP 500 cc single engines from 1928-1934.