Razzie, I run a GO GXII with the same looking 3 needle carb (possibly out of the same factory, the new JS also), we found the lsn needle needed to be around 1mm-0.75 mm out from flush to get the motor to idle well and have good take off power, any further in and the fuel is not able to get by the lsn at idle causing it to be too lean... you can test this by blowing through your fuel line when the carb is closed, it should feel as if its almost closed off...opening the msn has in effect done the same thing in allowing some (still minimal) flow of fuel at idle.