Dave. You is THE man. Had me baffled for a little while but - See the o-ring on the carb flange - No was the answer. For some reason I had the little screw in mind and couldn't understand where you wanted mine :-) Then I saw it. The black 'O' ring on the carb flange. Man, I'm going back to PC Case Modding :-)

Anyway, I see that this would certainly effect its performance somewhat. Unfortunately it is the middle of the night here so I shall wait until morning. In the meantime, would you mind if I asked you a couple of what may seem like simple questions to those experienced?

1) I notice that the screw in the centre of the picture is well worn? What function does this perform as mine is unused by the look of it?

2) The screw assembly just hidden by your thumb. Is this just the minimum setting for the carb opening? Oooops. If you undo that all the way, the middle comes out :-) (Refer to my signature for an explanation of the event that just took place).

3) I read, or dreamt, somewhere that there was an upper and lower needle valve? Not happening with this model of carb perhaps? I see only one?

4) In short? 1 1/2 to 2 turns from full in with the needle and let her rip? RIP meaning start, not Rest In Peace. Of course, AFTER I get my overpriced 'O' ring :-)

And Dave, many thanks for your help so far, muchly appreciated.

Martin