A handy little carburetor tool with jetting gauges from 0.45mm to 1.5mm or 1.5 to 3.00
A jet gauge allows for measuring the difference between two jet orifices, which may become necessary since different manufacturers use different scales for their main jets. After checking the jet size, you can then use a jet reamer to bore a jet orifice to a bigger diameter.
Option 1 = 0.45 to 1.5mm
Option 2 = 1.5 to 3.0mm