Need Help NC700X 2013 Engine noise

c11m

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Hello, I have NC700x 2013 model at 119.000 km bike. I realised that engine is starting make noise at 3500-4000 RPM (everything is normal up to 3000 RPM). Please watch the video. If I would not ride over 3000 RPM then there is no noise on the engine. Noise is stopping after 15 mins riding even if I go over 4000 RPM. We chect the clutch and oil pump but they are not the case. I do not think that this is timing chain(cam chain) or its tensioner but many people told me so.
I am riding with that noise for over 10.000 km at below 3000 RPM(for 15 mins than I am free)
Please watch the video and tell me if you had such a problem on your bike.
Video:
 
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c11m

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I have done the valve clearance but noise did not go away. I saw that pin of tensioner is 6.2 mm out so maybe it is the problem of the noise because manual says that if it reach up to 6 mm, change is required.
What do you guys think?
 
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