Various parts have been color coded. 
bulletThe balance chain rivets are blue. 
bulletBalance chain side tensioner is dotted green.
bulletBalance chain upper tensioner is dotted red
bulletThe timing chain rivets are yellow (lighter yellow dots where the chain is hidden in a tunnel).
bulletThe timing chain tensioner is dotted pink..
bulletThe intake balance shaft sprocket nut is light blue.
bulletThe exhause balance shaft sprocket nut is orange.
bulletThe idler pulley nut is black.