2005-2009 Honda TRX400EX/TRX400X Service Manual, Page 99Get this manual
FUEL SYSTEM AIR CUT-OFF VALVE Install new O-rings onto the slow air jetInstall the air jet in to the air cut-off valve with he stepped side facing the valve sideInstall new O-ring onto the air cut -oH valve and insta ll the valve onto the carbure tor body
Install the screw and lig hten it secure ly
CHOKE LEVER
Install the choke lever onto the pivot and choke arm rodInstall the setting plate in the direction as shown and tighten th screw