TOPIC:

Hi
before I alter anything else please could someone identify my carb so I know it is correct, 1978 KZ650 import from the US to U.K., and what the stock jets and settings should be, there are 2 sets of stamping on the body, one says 102-A and the other N7-X6
thanks 

Show a pic from the carb mouth to determinine if they are vm22mm or vm24mm.
The 22's have an additional kidney shaped air passage at the 10 o'clock position and are only found on the US imports..

This is the intake side, my manual that came with the bike says 90 main jets but it has 102.5 which I believe is for the 24’s which is what has confused me 

Yes! Those are VM24's and  the UK version Z650B should  have 102 main , 15 pilot ,5DL31 ( Y63 ) needle and 2.0 float valve.
 

Thanks , I will go forwards from there then ,
much appreciated