thanks for the suggestions.
nothing wrong with the old green light, clunk , click, lurch and sound of the horn behind as i pull off but in london every 100 yards is a set of lights and i do like giving the twist and goes a run for their money.
i did run a triumph pre unit clutch once and found it dragged all the time but it was my destitute period and had to run what i had.
now i m older and just broke so the 6 spring has to stay and i ll make my own adjuster from an old bolt then.
surprised there is no upgraded part available.