According the Service Manual, You'll need to add 2 liters during an oil change. 2.5 liters for engine overhaul.
Don't add more oil than half way between the lines on the dipstick or you may get a lot of oil that will blow out the breather.
http://www.xs650.com/forum/showthread.php?t=15
Here's a good resource on changing the oil and cleaning the oil filter on an xs650 http://www.xs650.com/forum/showthread.php?t=15
Lack of Oil Overheating
SAE10w30 Synthetic
The recommended about is 2500cc Source: http://www.xs650.com/forum/
The oil capacity is 7quarts
Honda cfr100 oil capacity?
The oil capacity of the VTX1300 when changing the oil is 3.9 quarts.
The oil capacity is 17oz of 80/90w gear oil. The oil capacity is 17oz of 80/90w gear oil.
When changing the oil or oil filter of a car, it is important to know the cars oil capacity. For a 1997 Oldsmobile Bravada, its oil capacity is 4.50-4.75 quarts of oil.
Oil capacity (quarts) = 4.5
6d14 oil capacity
The oil capacity is five with a new oil filter.