Hello everybody, I haven’t been here for a couple of weeks now, because my GPZ 600 runs like clockwork 🙂 Now to my question: I bought a nice GPZ 500 Bj. 88 for my girlfriend on the weekend. This has 50 hp in the appearance, which is probably true. Since she is doing her driver’s license and wants to get the “open” appearance directly, the machine must have at least 60 hp for the test (i.e. the original, open performance of the GPZ 500). Who can tell me how ic h get the GPZ now from 50 hp to 60 hp?? I know! There are a lot of things in the forums. But I have only found the removals from 34 to 60 hp. Is it true that in this case (50 hp to 60 hp) I only have to change the carburettor lids?? Thank you and many greetings, Claus