Another update on this machine, if anybody cares. On this carby I have cut both the springs to about 20mm long above and below the diaphragm and it is working perfectly so in my opinion all the rubbish about you must have this certain spring is a load of rubbish. I have been playing with the spring lengths for a long time but from now on I think I will just use the 20mm rule. It removes any pressure from the lifter and just allows it to lift up and down easily, infact the diaphragm cap came off and the motor ran fine, only reason I need the cap is for idle adjustment and to keep the dust out.
