2003 Honda ATV TRX650FA Rincon Factory Service Manual, Page 111Get this manual
FUEL SYSTEM Inst all th shi and washer onto th jet need le and insert the jet need le int he vacuu pistonInstall the spr in set late onto he needle holde rInstall he sp ring in to the nee le ho lder and set the need le ho ld er into the vacuum piston
DIA PHRAGMIPISTON
SET PLATE ET NEEDLE WAS HER Turn th need le hol der 90 degrees clockw ise ile pr essing it unt il it locks
NEEDLE HOLDER
Be careful nor to damage the fer needie
Insta ll he iaphrag mvacu um piston into th ce rou-
reto bod by aligning th tab of the diaphragm
with th air passage, then insert he jet need le nto he nee dl je tLift he bottom of th pist on it you fi nge to set