13-1. FUEL SYSTEM/CARBURETOR/ FUEL PUMP/ FUEL TANK GRAND DINK 125/150 FLOAT LEVEL INSPECTION Measure the float level at the location of the main jet (just contacting the float valve). Float Level: 18.51.0mm Replace the float if the level is incorrect. Check the operation of the float and then reinstall the float chamber. Float Vacuum Piston VACUUM CHAMBER ASSEMBLY First install the jet needle and spring into the vacuum chamber and then install the needle holder. Jet Needle Spring Needle Holder Vacuum Piston Install the vacuum piston into the carburetor body. · Align the hole in the diaphragm with the hole in the carburetor body. Install the spring. Install the vacuum chamber cover and tighten it with the two screws. · Be careful not to let the diaphragm slip. · If the diaphragm cannot be positioned correctly because of expansion, dry the Spring Diaphragm di h b f i t ll ti 13-16