Fitting kickstart pedal

LI 125 1960 series 2 conversion to 175
I am trying to fit a casa series 2 kickstart pedal and am unsure about the number of circlips to use.
Is it shim then circlip then pedal then circlip.
It is also extremely tight push on the shaft is it advisable to open up the pedal a bit
thanks
I am trying to fit a casa series 2 kickstart pedal and am unsure about the number of circlips to use.
Is it shim then circlip then pedal then circlip.
It is also extremely tight push on the shaft is it advisable to open up the pedal a bit
thanks