Had a look here: http://www.bingpower.com/english/service/einstellblaetter.html 94 is a long way down!
The 40 = 40mm last number being odd = LH
Thanks for the info John, the 123 & 124 shows left and right carbs as you mentioned.
Looks like the standard start position for the airscrew is 1 1/4 turns open. The bike is going tomorrow for it's MOT and will play a bit more at the Gentlemens weekend
