I have had several 70s bikes and all of the ones I had used at least 2 oils.Including 4 Suzukis and 3 Yamahas, those were all 2 strokers and had a separate primary oil can't remember if they had a separate tranny oil anymore or not. Then there is my 64 BMW that has engine oil,tranny oil , drive shaft oil, and differential oil. All separate. Dry clutch in that once so no primary oil.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!