2000 VFR SMC Re-build Question

[faran 9]

Alright, so I had brake fluid seeping from SMC and it needed to be rebuild.

I have done the rebuild and no more leaks/seeping, but now when I push on rear brake, can hear a slight thumping sound and that disappears after 2nd or 3rd push on rear brake pedal. Is it normal?

 

Maybe just for me, but it was a real pain to install the circlip back into SMC bore, is there a special trick to install and push down on connecting rod, brake piston and circlip — all at the same time?

Can the noise be caused if snap ring(circlip) is not seated properly? Thank you for the help and advice.