2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 37Get this manual
MAINTENANCE
FUEL LINE
Check the "ONand "RESERVEfuel hoses for deterioration, damage or leakageReplace the fuel hoses if necessary
THROTTLE OPERATION
Check for any deterioration or damage to the throttle cableCheck the throttle lever for smooth operationCheck that the throttle opens and automatically closes in all steering positions
If the throttle lever does not return properly, lubricate the throttle cable and overhaul and lubricate the throttle housingIf the throttle lever still does not return properly, replace the throttle cableWith the eng ine idling, turn the handlebar all the way to the right and left to ensure that the idle speed does not changeIf Idle speed increases, check the throttle lever free play and the throttle cable connectionMeasure the throttle lever free play at the tip of the throttle lever