diametre exterieur volant moteur

hi
please help me with some information about "volant moteur" for r5 turbo 2
has it 190 mm "embrayage"?
can you tell me exterior (I) and interior(II) diameter for pigninon demareur .......i paint in next image
https://servimg.com/view/12638042/43

i have a r5 alpine turbo embrayage (180 mm) and i have big problem with it at 140cv.....i want to modify all mecanism for embrayage

thanks a lot