My vibration problem solved

Just found a pic with my engine ser# (CES pipes block it from view) 3442936. Are you missing a digit from yours?

Different markets have different number formats I believe. My UK and USA engines have different numbering formats for example.





That's pretty normal on these I've found.
Fairly sure it's the lifter piece/pullrod rattling about, since it goes away when you take the slack out by pulling clutch lever a tad, and it is non-existent with the hydraulic clutch conversion (pullrod doesn't rattle about with that setup).

I believe the wavy washer is there to dampen this rattling on the OEM lifter piece/pullrod. I want to experiment, probably by shimming it a tad to improve its dampening effect, but have not got to it yet, to see if that fixes or at least improves it.

 
what is the Hydraulic clutch conversion if you don't mind me asking