Around 3/4 of a quart.
On my 1986 it 200 i run the good klotz oil at 50:1 but if u run a cheaper oil i would run a 36:1 or 40:1 ratio the klotz is expensive but is the way to go because it extends engine life and smells good too
Yamaha's Yamalube, 2 stroke oil should work pretty good
The 1984 model, 200 hp Yamaha requires a 50:1 ratio.
20/50 w Yama oil is what i use
its a 2-stroke, you keep adding oil
250
lowest possible point on the engine
The transmission oil goes in thru the dipstick tube.
Change the oil.
800cc
1000 cc