OK this is all a bit long winded and a difficult post to answer and explain properly, so I apologize in advance & appreciate any help you guys can give me CHEERS!

I bought a new amal valve (pictured on the left with the white inserts) but when I took the old amal valve off (pictured on the right) with what looks to be brass carburettor jet inserts with 100 stamped on them, the white inserts has a hole of about 2mm but the brass jets has a hole of about 0.5mm, what is the reason for this ie: I had a stage 2 conversion fitted by GGR a couple of years ago would they of changed the inserts and should I change them over to the new valve?

I've also just fitted a new stage 2 turbo, I just thought I would mention this incase it makes a differance.






Also does it matter which way you wire it up because like TWAT that I am, I've forgotten which wire goes to which terminal.

does the brown & yellow wire go to the terminal ubove the letter S on the top of the valve?

and does the black & red wire go to the terminal ubove the M on the top of the valve?