Knocking sound and feel on 91mod 750

Hi!

Please listen to the sound from my video
https://www.jottacloud.com/share/eouokk8tb11s
Especially around 37-39 sec in the video, you can hear a metalic knocing sound.
It can be heard while driving, especially at lower rews, but I guess that is mostly becouse the higher rews mask out the sound both because the general motor sound is higher and the speed of the sounds are more high freequent.

Is this bad?

 

That sounds like clutch rattle to me, and that is neither a concern or unusual. The idle sounds quite unsteady and suggests the carbs might need to be balanced, which should smooth out the idle and maybe reduce the knock. Certainly the rest of the engine (aside from the knock) sounds fantastic.

 

Whats the mileage on the unit? When was the last time you had the carbs synched? Out of sync carbs can sound like that, the slides rattle around too.

 

Actually it was the chain that was very loose that caused the worst knocking sound.
After I tightened it, it went away. I guess even when it stood still the motor vibrations made it knock into everything.

However now I can also hear the carb issue and also feel a bit uneven idle that your fine tuned ears heard long before me
Also i can hear some "poppopop" (there is probably a word for that) from the motor after rewing and than letting it drop fast in rpm. Probably also a sign that i need to adjust the carbs?

Sent fra min Pixel 7 via Tapatalk

 

If you were my neighbor, I would do it for free for you.