2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 70Get this manual
MAINTENANCE
FUEL LINE
Remove the rear fender ('04'05: page 3-7, After '05: page 3-7)Check the fuel line for deterioration, damage or leakageReplace the fuel line 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 positionsIf 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 engine 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 connection'04V5: Measure the throttle lever free play at the tip of the throttle leverTHROTTLE LEVER FREE PLAY:mm (18-516 in) Throttle lever free play can be adjusted at either end of the throttle cable'04'05