Hello, I’m just setting the valve play at my ZR7, here I’ve been provided with two instructions. Guide No. 1http://www.s-n.name/ZR7Forum/Ventile/Ventilspiel_002_tommi.htm Essentially, this statement is concerned: When piston number 1 is on OT, the following valves can be measured. No. 1: Inlet and outlet, No. 2: Outlet, No. 3: Inlet If piston number 4 is on OT, the following valves can be measured. No. 2: Inlet, No. 3: Outlet No. 4: Inlet and release instructions no.2https://www.youtube.com/watch?v=e0cJ0Ca1EUo I can summarize the explanation in this video: In the OT marking 1-4, for example, cylinder 1 stands when ignition –> Valves are closed and can be tested (one + outlet cylinder 1). Cylinder 4 is then pre-priming –> Valves overlap and a measurement is not possible. A complete revolution further up to the OT marking 1-4 is cylinder 4 when ignition –> Valves are closed and can be The same is done with cylinder 2+3 Now the conflict: the first variant is quite celebrated and applied in the ZR7 forum … I remember then to have set my GPZ according to the instruction No. 2. According to instruction No. 2, the respective cams are always horizontal to the head and this is a memory that remained for me from then on. The measurements for both variants are very different, therefore my question : Is variant 2 correct and therefore variant 1 wrong? I just remembered something. At that time I had a shop at hand, because I paid 1.20€-2.20€ per Shim + mail delivery. Now I can only find shops where it starts from 6,90€ per Shim + 6€ shipping ….has jmd alternative dealer at start? I thank you for helpful answers. LG