1981-1984 Official Honda ATC250R Shop Manual, Page 39Get this manual
ATe 250R
FUEL SYSTEM
NEEDLE JET MAIN JET MAIN JET HOLDER
CARBURETOR REASSEMBLY
Install the needle jet, main jet holder and main jetInstall the slow jetInstall the air and stop screws by turning them into their original positions
STOP SCREW FLOAT Install the starter valveInstall the float valve, float and float pinCheck the float for operationFLOAT VALVE