2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 149Get this manual
FUEL SYSTEM (After '05) THROTTLE STOP SCREW CARBURETOR SWITCHTHROTTLE DRUM ASSEMBLY Remove the spring set plate and carburetor switch wire grommet from carburetor bodyGROMMET
Remove the throttle stop screw and spring by turning the control cable to clockwiseRemove the carburetor switch assembly from carburetor body