Hello, I have the following problem with my GPZ. After a longer service life (about 1 year) I wanted to make my motorcycle fit again. The first start attempt also went quite successfully, engine started running but a bit unrounded. π Misfires etc., when I then noticed that petrol from the carburetors ran out I called my workshop and they picked up the motorcycle then. Carburetor was cleaned etc, new spark plugs, TΓV new BUT it didn’t run right! After the carburettor 3X has been removed and cleaned and the part still does not work (400 EUR paid π ) you have measured the compression: 1. Cylinder: 5 bar 2. Cylinder: 10.5 bar 3. Cylinder: 7-8 bar 4. Cylinder: 10.5 bar A repair should cost so 800 – 1000 EUR, so it is necessary to make it yourself… Do you have any idea what this can be? I assume either from defective valves or piston rings… π ==> I get this with Help of the workshop manual itself? (Hab mir schon bei EBAY ein cylinder, neue Piston und cylinderkopf erfΓ€lt… π ) MfG Andreas