Slaninar, if the book says 2.7 and it's been said on here before around 2.7, then why would you say 2.9 ?
You're encouraging an overfill, and that ain't helpful is it, even though it's only 200ml?
I swear you must shake your bike upside down to empty it?
Fizzy Pies, you are safe chucking in 2.5 litres straight away without a problem, then start the bike for 30 seconds and watch the window.
The oil will raise then stop, although you may not see any straight away as it's not enough.
Then add
a little bit of oil and repeat the above steps again, adding a bit at a time until it eventually stops where you want it, between the markings.