1981-1984 Official Honda ATC250R Shop Manual, Page 37Get this manual
FUEL SYSTEM CLIP
Remove the jet needleCheck the jet needle and throttle valve for wear or damage
JET NEEDLE
THROTTLE VALVE
CARBURETOR DISASSEMBLYINSPECTION
Remove the float chamber and pull the float pin off the chamberCAUTION:
THROTTLE VALVE SPRING
RETAINER PLATE CLIP