2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 219Get this manual
CYLINDER HEADVALVE To prevent loss of tension, do not compress the valve springs more than necessary
Install the valve cotters using the valve spring compressorTOOLS: Valve spring compressor Compressor attachment 07757-0010000 07959-KM30101
SPRING COMPRESSOR COTTERS
Support the Tap the valve stems gently with two plastic hamcylinder head so mers to seat the cotters firmlythe valve heads will not contact anything that cause damage