Typical of me innit, get so fixated on what the problem is'nt, defo thought the throttle shaft was boogered, also i released the return spring and still did'nt notice it was jammed up...
Not on the bike yet, no point as in work so it can wait until i'm off now, i have put them back together on a level surface and checked with a level gauge and then i've bench synced them, should help start up then i'll sync em on the bike, the actual throttle stop is the rail that joins the carbs together on these mk2a. Any issues i'll use me mk1 carbs as have a float bowl on the way now...but hopefully a bit of vroom vroom soon, again.