1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 89Get this manual
CYLINDER HEADVA LVES Apply molybdenum disulfide grease to the camshaft journals of the cylinder headApply oil to the cam lobesInstall the camshaft in the cylinder head, positioning the cam lobes downInstall the cam chain over the camshaft as shown
Raise the camshaft and install the cam sprocket onto the shoulder of the camshaft with its punch mark facing to the right, and reset the camshaft in the cylinder head
Pull the sprocket slightly forward off the shoulder and install the cam chain while rotating the sprocket until the punch mark is at the top