2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 136Get this manual
FUEL SYSTEM ('04'05)
CARBURETOR INSTALLATION
Connect the throttle cable to the throttle drumInstall the throttle cable adjuster into the carburetor and temporarily tighten the lock nutRUBBER CAP
Install the throttle drum cover onto the carburetor and tighten the screw securely