2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 182Get this manual
CYLINDER HEADVALVECAMSHAFT Grease the cotters to ease installationTo prevent loss of tension, do not compress the valve springs more than necessary to install the cotters
Install the valve spring cotters using the valve spring compressor
SPRING COMPRESSOR
TOOL: Valve spring compressor 07757-0010000
Support the cylinder head so that the valve heads will not contact anything that cause damageTap the valve stems gently with two plastic hammers as shown to seat the cotters firmly