I would recommend using exactly 1,7 liters of whichever quality brand of Motorcycle oil in 15w50 is readily available.
And that normally the first oil change should be done by the dealer because at 1000km alot of stuff needs to be checked/tightened/adjusted.
As for oil type, I personally decided to go with motorex topspeed for my last 3 oil changes, and will probably put in motul 300v once I feel the engine and tranny have broken in enough to be ready for racing synthetic.