Erratic knock from cylinder head
I've finally got my '97 XT600 running after rebuilding the bottom end. Sadly the knock that was one of the reasons I did the work in the first place is still there.
If anyone has a minute to listen to the video and identify what the noise might be, and whether it is serious, I would be very grateful. https://youtu.be/WV7aPlAHZh4
It is an erratic sound that happens at low revs, just above idle, is distinct enough to feel through the handlebars and seems to be coming from the top end.
The spinning bit you can see on the left of the screen is the remains of the rev counter cable which I have removed. The noise is definitely not coming from there or from the bearings, woodruff keys etc in the crankcase which are brand new. As I said above this noise was occurring before I did the work.
Thanks in advance for any help.
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