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Hello nice bike , unusual sound ... I'm wondering if some part of the exhaust is broken off inside the muffler..

 

Yep I agree, sounds like something is slapping around in the exhaust.


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Is the rpm dropping to the same timing as the sound you are hearing? Could not see clearly in vid. If so, sounds like a misfire or timing issue.(firing with exhaust valve not fully closed). Or possibly a burnt exhaust valve.

 

何がいい？ RC8R problems movie
↑↑↑

Hello! I have an RC8R.(2014)
。 who knows?? I want you to tell me!
。KTM RC8R Idling problems..
I can hear a sound…. pus pus pus…。

I don't know what's going on…。

こにちわ
I think it sounds like a misfire. Check spark plug gap. Hope it helps.

 

何がいい？ RC8R problems movie
↑↑↑

Hello! I have an RC8R.(2014)
。 who knows?? I want you to tell me!
。KTM RC8R Idling problems..
I can hear a sound…. pus pus pus…。

I don't know what's going on…。

Same issue, idles bad and misfires, then when riding get all its power back and misfire again. Tried so many things. In the end found out factory muffler cat fell apart inside clogging the rear cylinder.