Zenoah G430RC Owner's Manual page 17

SERVICE GUIDE
5) CARBURETOR ADJUSTMENT
The carburetor comes with a standard setting, it is for
optimum performance under the barometric pressure and
climatic conditions at factory, so it may be re-adjusted
according to load applied.
Idle rpm : 2500 ± 300 rpm (STD Spring)
H needle : 1 3/8 ± 1/4
L needle : 1 ± 1/4
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