Clutch Knock

[Html33]

Hi Guys n' Girls

Just stripped and rebuilt the headstock bearing, still had the original OEM one fitted and had an awful notch at 12oclock. Lovely bikes to work on, was easy to lift old one out, new one in! Was a pleasure to work on.

Any way, i went out for a spin earlier and noticed when the clutch was out and in netural, i could hear a knock, i could also feel it through the seat and frame etc. When the clutch is pulled in that goes away just leaving my slightly noisy cam (getting a manual cct soon)

Any one got any idea of what it might be? Bike is new to me (done about 200miles, bike has 31k) but seems to pull hard, strong clutch, starts on the button and revs crisp.

thanks