For the US model, install the pilot screw plug as follows: install a new plug [B] in the pilot screw hole of the carburetor body [C], and apply a small amount of a bonding agent [D] to the circumference of the plug to fix the plug.
Caution! Do not apply too much bonding agent to the plug or the pilot screw itself may be fixed.
Set the float height as specified (see Service Fuel Level Adjustment).
After installing the upper chamber cover, check that the vacuum piston slides up and down smoothly without binding in the carburetor bore.
Carburetor separation
Remove the carburetor (see Carburetor Removal).
Read the WARNING in the carburetor disassembly.
Mark carburetor locations so that the carburetors can be installed in their original positions.