1995-2003 Honda Foreman TRX400FW TRX400 TRX 400 400FW Service Manual, Page 91Get this manual
FUEl SYSTEM
AIR CUT OFF VALVE
Insta illhe o.rings, ai, jet and air CUI off lIaleNOTE Nole the direction of Ihe air jM shownInstall and tighlen Ihe SCrew secu,ely
I AIR JET
DIAPHRAGMVACUUM PISTON
Install the needle clip on the jet needleSTANDARD STT1NG: lid 9roove 110m 10p
12) JET NEEDLE '-(1) NEEDLE CLIP
InSTalilh8 washerjet needlespring and lei n&edle holder to the vacuum plsIonPUlh Ilia jel naedle hold in and turn II 90 degrees clockwise