This is a dumb question, BUT...
When I got my bike home and took the head off and sent it in for work, I also did some general maintenance and exploration. I added some clean oil (maybe half a liter) to the engine.
A few days later, I dumped all the oil out of the bottom of the engine via the drain nut. I also opened up the timing cover and let the oil drain out of that. And the same for the chaincase.
All nice, thick, black goo.
Yet when I check the oil dipstick, it still shows half full... of nice clean oil.
I'm guessing that the oil reservoir is pumped to the rest of the engine, and as I haven't run the engine, the reservoir remains full?
If not, something is clogged somewhere.
I thought I'd check this with the experts... I can't really tell from my manual how the oil moves around the engine.
Advice welcome!