I did one cyl at a time and started with the front. Then remove the valve cover (4 10mm bolts) and behold the lungs of your 1190: To measure the valve lash or clearance you need to have the engine at Top Dead Center (TDC). This will be indicated by the two dots on your cams lining up with the top side of the head:
Z556. 39 696 44 270 790 991 583 217