2004-2005 Honda TRX450R Factory Sevice Manual, Page 157Get this manual
CYLINDER HEADIVALVE
CAMSHAFTI DECOMPRESSOR ASSEMBLY
CAMSHAFT
CAMSHAFT HOLDER
DECQMPRESSOR ARM
DECOM PRESSOR CAM
ROCKER ARM
DECOMPRESSQR EIGHT
SETTING PLATE
LIFTER ARM
RETURN SPRING