Hi John,

All Zama Carbs I am using I start at 1 1/4 turns.


Raise the the RPMS to 4000 with the screw for throttle adjustment then play first the high needle , turn it till you get a nice "round" sound and engine pics RPMS. then do the same with Low needle. After that back out the adjustment screw to your desire idle.
Then go and check how it transition and how it runs on WOT. If you want ...then try to lean uot till you get the highest RPMS then go back on rich side till around 200 rpms are dropped. You do not want to run it to lean.
If carb does not have a accelerator pump you will want to run it a bit rich at idle.( turn the needle on the rich side till you drop around 200 rpms.and try transition again.

I am not sure if this make any sense to you ...but I domoust by ear and feel.
Zama has all the technical data for all egines on theyr site.

http://www.zamacarb.com/prod_lookup.cfm , select the carb series then the model.

Hope it helps.

Adrian