Meal, today wanted to measure the valve play of my GPZ, made everything happen and then I wanted to put the crankshaft on T14.1. Problem…which notch is correct? (see picture) I took the one with the green mark….unfortunately I had to find out that not valve 1+4 and (after a 1/2 rotation of the crankshaft on the opposite notch) 2+3 are relaxed at the same time but 1+3 and 2+4.. According to my documents I should measure inlet/outlet 1+4 or inlet/outlet 2+3. but this consolidation was not possible since one of the two was neither measurable, because either a cam pressed the valve or because the cam was right in front of it…=measured impossible… I then measured 1+3 and 2+4, as it looked like they were always relaxed at the same time…have the following values (to be 0,08-0,18mm) outlet 1= 0,15mm outlet 2= 0,12mm outlet 3= less than 0,04mm outlet 4= 0,25mm inlet 1= 0,10mm inlet 2= 0,17mm inlet 3= less than 0,04mm inlet 4= we Niger than 0.04mm seem the values plausible?? Does me worry a bit if 3 valves are very tight!! Have valves only measured because the engine is a little cloded, but if only one valve is too loose, then this is rather improbable as a cause of error or??? MFG Schueddi