FZ400 engine noise (YouTube video attached)

[tatastha-sakti]

Thanks for replies, fellows.

Yes, it might be camchain, but the sound comes mainly from the right side of the engine and camchain is in the middle. Or it doesn't matter?

I've checked to temperature if the downpipes. The third one was just a little warm. Then I checked the spark plugs. The third one was all wet with oil and petrol, black as coil.







Then I installed the new spark plugs and the third cylinder switched on. Now the engine works better, the bikes goes better. The uplift that goes after 6000 came back.

Well, but the noise is surely still there. I made another video with new spark plugs. Here it is:

Yamaha FZ400. Движок барахлит ч.2

Now, what about exhause. Well, His Dudeness, they don't seem to be rusty, I guess... Here are the pics: