Your questions can be answered by looking into the user manuals.
SCR 1st series: 180 -185 ccm AGIP F.1 Rotra ATF, 3 - 4 °Engler
SCR 2nd series: 230 ccm AGIP F.1 Rotra ATF, 3 - 4 °Engler
You can find a viscosity (not "weight") conversion table here:
http://www.nadi.it/english/viscosita.htmThe differences between series 1 and 2 you might spot here:
https://www.motorcyclespecs.co.za/model ... r%2068.htmAGIP is now ENI, and afaik this
https://oilproducts.eni.com/media/pdf/d ... 99_ENU.pdf is the according datasheet of the product.
cheers Hans