I have a 1983 secca 750 cc and upto now its in near perfect shape everytime i had it change oil in the shop maintaining my bike i always ask my mechanic the amount of oil needed and he always answer me 2.8 litrs.but usually we place 3 liters.ive been having dat amount of oil for this bike everytime i change oil and i havent got any problems of the engine performance.this bike has travelled thousands of kms.in our place