Come on Tony, it's just 450ml ....surely it takes longer to undo those 4 bolts, remove the cover, put back the cover, then put the 4 bolts back again.....than it does to poor the oil down that hole??
Or maybe my impression is wrong because I've been using Castrol Edge for 2 years now.
BTW....Things are getting colder at night around here and my bike has not been ridden for 3 days. Started her up, pulled in the clutch and clicked her into 1st with just the front brake on. There was a twitch but the bike stayed standing and engine kept running!!.....looking good, but still testing
Best of balance.
Neo