2005-2009 Honda TRX400EX/TRX400X Service Manual, Page 48Get this manual
MAI NTENANCE
FUEL LINE
Remove the left side cover (page 3-4)Check the fuel hose for deterioration, damage or leakageReplace the fuel hose if necessary
THROTTLE OPERATION
Check for any deterioration or damage to the thrott le cableCheck the throttle lever for smooth operation Check that the throttle opens and automatically closes in all steering positionsIf the throttle lever does not return properly, lubricate the throttle cable and overhaul and lubricate the th rott le housingIf the throttle lever still does not return properly, replace the throttle cable With the eng ine id ling, turn the handlebar all the way to the right and left to ensu re that the idle speed does not changeIf idle speed increases, check the throttle lever free play and the throttle cable connection Measure the throttle lever free play at the tip of the throttl lever