15w 40 is recommended for this size engine. 10w 40 will suffice if no 15w is available.
RECENTLY CHANGED MY 1981 750 VIRAGO. TOOK 3 QUARTS OF SYNTHETIC MOTORCYCLE OIL
Hi: The oil capacite for the 750 Virago is 3.3 quarts with filter or 3.2 quarts with out Frank;
The oil capacity for a 1989 Yamaha Virago XV-750 is 13.4 ounces. This motorcycle gets 45.2 miles per gallon, and its top speed is 108.7 mph.
oil level light
1990 Yamaha Virago 750 is 55 hp.
10/40 Motorcycle/ATV Oil. Around 3.3 Quarts with filter change.
Rotella 15w30 diesel engine oil
seven inches from the top with the fork collapsed and the spring out
There should be a sight glass on the left lower side of the motor. The oil should be visable in the glass.
SAE 10w30 Full Synthetic, any major brand.
3.2-3.7 qts max This is with filter change.
The drain plug on a 1981 Virago 750 on the underneath part of the radiator. You will need to remove a bolt to drain it.