2007-2009 Honda TRX300EX TRX300X service manual, Page 86Get this manual
FUEL SYSTEM Remove the two s'crews and throttle linkage coverSCREWS
Loosen the throttle cable nutDisconnect the throttle cable from the throttle drum
Disconnect the throttle cable from the carburetorSeal the insulator with tape or clean cloth to keep dirt and debris from entering the engine