It says the oil cap. On the crank case cover. I have the same bike, but I can't remember off hand the exact amount. I believe it is measures in ml on the crank case.
Per Clymer manual... .8 Liter .85 U.S. Quart
The Crank Case Holds 3.79 Litres = to 4 US Quarts.
1100 ml =1.1L = around 1.2 quarts of oil its written on the crank case.
33 @ the rear wheel
25-28 hp
None
3 qts with new filter / 2.5 if you use old one but trust me put a new filter on its worth it
your crank case does not take oil at all. your transmission however will take usually 1 to 1.5 quarts of approved transmission oil.
5 QTS. with new filter.
It sounds like there is too much pressure in the crank case, causing oil fumes to be cycled through the breather. High pressure in the crank case is caused by worn cylinder bores, allowing 'blow by'.
700