[2015 Z Force 800 53/Trail EPS]

My theory is, that one spring of the wet clutch was faulty, so one pad was fried, and now its hitting clutch case. ill keep you informed, when my dealer check it.

Makes sense. Let us know. Wouldn't be the first time they have an issue with springs...

Yeah, from the video where you turned it by hand, it's obvious it's in the clutch. In that video it sounds like it could be a roller out of place, but in the other it sounds like it's definitely in the wet clutch.

Its an 800 EX brand new.
i hear a bad rattling when desacelerating, at certain low rpms. Im prety shure that is the belt hiting the case.
when riding and engage, no strange noises.
when its iddling, i can here it but realy low.

Is this normal?

Well, these have tension on the belts all the time and use a wet clutch. and there isn't any way for any part to hit the case unless something is broken. I hear a rattle on mine too..almost like a kind on knocking when I first touch the gas especially when cold. I think ...well I hope..it's just the wet clutch making noise before it get fully lubed with oil. It does seen to stop in a short time. And it does sound like it's coming from the clutch case.

I noticed a knocking noise on my 2014 CF500 (251 miles) when cold and just above idle.  Sounded just like an engine bottom end problem, though it sounded more to the rear of the machine.  After reaching normal operating temps, the noise went away.

[2015 Z Force 800 53/Trail EPS]

I noticed a knocking noise on my 2014 CF500 (251 miles) when cold and just above idle.  Sounded just like an engine bottom end problem, though it sounded more to the rear of the machine.  After reaching normal operating temps, the noise went away.

Well, if the 14 500s have a wet clutch like the 800s, I can say mine had made knocking noises when cold ever sense day-one. Hasn't got any worse...or better and does go away when warm.

I noticed a knocking noise on my 2014 CF500 (251 miles) when cold and just above idle.  Sounded just like an engine bottom end problem, though it sounded more to the rear of the machine.  After reaching normal operating temps, the noise went away.

Well, if the 14 500s have a wet clutch like the 800s, I can say mine had made knocking noises when cold ever sense day-one. Hasn't got any worse...or better and does go away when warm.

Here's when it's cold...

https://www.dropbox.com/s/zzji2arb1bg334z/20180124_115452.mp4?dl=0

I noticed a knocking noise on my 2014 CF500 (251 miles) when cold and just above idle.  Sounded just like an engine bottom end problem, though it sounded more to the rear of the machine.  After reaching normal operating temps, the noise went away.

Well, if the 14 500s have a wet clutch like the 800s, I can say mine had made knocking noises when cold ever sense day-one. Hasn't got any worse...or better and does go away when warm.

Here's when it's warm...

https://www.dropbox.com/s/bdgkdr2u272ftob/20180124_120337.mp4?dl=0

[2015 Z Force 800 53/Trail EPS]

I noticed a knocking noise on my 2014 CF500 (251 miles) when cold and just above idle.  Sounded just like an engine bottom end problem, though it sounded more to the rear of the machine.  After reaching normal operating temps, the noise went away.

Well, if the 14 500s have a wet clutch like the 800s, I can say mine had made knocking noises when cold ever sense day-one. Hasn't got any worse...or better and does go away when warm.

Here's when it's cold...

https://www.dropbox.com/s/zzji2arb1bg334z/20180124_115452.mp4?dl=0

Wow...that's loud. Mine isn't that bad...or consistant. That has the earmarks of a rod bearing but need to pull the clutches and run it. If gone- its clutches. If not..well..not clutches.