2005-2011 Honda FourTrax Foreman TRX500 FE/FPE/FM/FPM/TM Service Manual, Page 131Get this manual
FUEL SYSTEM Be careful nor to pmch the diaphragm under the chamber cover, and to keep lhe
Install the spring and vacuum chamber cover while the piston remains held in placeAlign the concave of the cover with the air passage in the carburetor body and secure the cover with at least two screws before releasing the vacuum piston
spring straight
when compressing the spring