Tach people, so mine also does it, the seat I mean. When accelerating there is something clacking in the mechanics. While trying out in the stand, I found out that it is not the pre-back mechanism, but the high-down mechanism. After some time this is annoying. Since I have not followed this topic of various Freds here so far (because it did not concern me yet ) and the search function is currently switched off, now the question whether there is any remedy? Thank you and greetings