Das MZ Forum für MZ Fahrer

This might be of interest to you. Due to ongoing issues with the primary drive in small MZ motorcycles, I decided to modify the original setup and adapt it to a different chain.
More details are covered in the video — for now, this is episode one. English and German dubbing are available, so I hope you’ll find the idea or some inspiration useful.
Best regards.

In short, the idea is to replace the 06C2 chain with a 06B2 chain, which is available for use in primary drives — for example from Renold, supplied as an endless chain made to order.
In this series, I will be manufacturing new sprockets from 17HNM steel (18CrNiMo7 according to ISO), covering the entire process from design to final machining.
For now, this is part one, where I explain the problem itself.
In my modified engine, the combination of MZA components and a Czech chain did not last even 1,500 km, so the decision was made that something had to be done about it.
Additional information can be found in the video description.

If you have any questions or suggestions, feel free to ask.

Das könnte für euch interessant sein. Aufgrund der Probleme mit dem Primärantrieb bei kleinen MZ-Motorrädern habe ich mich dazu entschlossen, den originalen Antrieb auf eine andere Kette umzurüsten.
Weitere Details werden im Video erläutert – vorerst ist dies die erste Folge. Eine englische und deutsche Sprachversion ist verfügbar, daher hoffe ich, dass ihr aus der Idee oder dem Ansatz etwas für euch mitnehmen könnt.
Viele Grüße.

https://youtu.be/ODvqHk6SYvE?si=EDR1JeeE0Y3K8obJ

That‘s very interesting, thanks for sharing! Have you already finished the modified primary drive and mounted it on your ETZ? Are there perhaps already long-term experiences regarding durability? Very few people can manufacture gears themselves. Did you do that just for your own use, ore are you considering selling the gears yourself, or finding someone interested in the conversion who would sell them as a spare parts kit?