2006 Honda TRX680 Rincon Factory Service Manual, Page 219Get this manual
CYLINDER HEADVALVECAMSHAFT Check the decompressor cam operationPress on the decompressor cam as shownAs you press on one side, the decompressor cam should lock above the base of the exhaust cam lobeAs you press on other side, the decompressor cam lobe should extend below the base of the exhaust cam lobe
Push DECOMPRESSOR CAM
INSTALLATION
Carefully rotate the crankshaft while holding the cam chain to avoid jamming the cam chain against the timing sprocket of the crankshaft
Turn the crankshaft clockwise using the recoil starter and align the "T" mark on the flywheel with the index notch in the crankcase coverRetract the tensioner lifter shaft and secure it with the stopper tool (page 9-16)INDEX NOTCH "T" MARK