30. Spark plug is out.





31. I removed the 2 accessing screws…





32. … (The o-rings were in good condition)...



33. …and the camshaft sprocket cover.





34. I turned the crankshaft counterclockwise by using a 22mm hex socket (the image is from the OEM manual, because I forgot to take a photo). I continued turning the crankshaft until the “I” mark (a) aligned with the stationary pointer on the magneto cover (b).



35. On the camshaft sprocket there's another “I” mark which moved at the bottom (overlap TDC of the exhaust stroke - I don't want this one)...



36. ...So I made another circle counterclockwise. (Do not confuse the “I” mark on the crankshaft with the “H” mark that comes just before it).





37. The piston is now at TDC (of the compression stroke), and the 4 valves are closed and ready for adjustment.



38. I removed the intake and exhaust tappet covers..













39. …and inserted the feeler between the adjusting screw and the valve.