New Project Yamaha DT 125X | Strip down | Remove Cylinder | Part 1

This is my new project for the winter 2023/2024.
Bike: 2005 Yamaha DT125X
I will do a full engine rebuild(with 170ccm cylinder) and some other things that should be fixed or replaced.
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[@JT-pk2uj]

Thank you for your always good videos！
I from Japan and now I live in Germany.
One day I wanna buy some motorcycle.
because motorcycle like Diamond in Japan are sold cheaply in Germany.
So I have a question. I heard that in Germany, if you make customizations or change tires, you need to pass an inspection.
Is this true?

[@EdelwiseEntertainment]

Thank you JT!
The Manufacturer of the tires has a official list for which tire is allowed for which bike. Usually you can find that list on the manufacturer website.

[@JT-pk2uj]

Thanks you for answer!
Tires is just example.
In Japan, vehicles are inspected by the government once every two years.
The test passes if everything is within the specified values.
However, I read on the Internet that in Germany, if you do the maintenance yourself, you have to send it in for inspection again.
For example, if the season changes and you just change from normal tires to studless tires,