I figured out the following info within the first 3 months of owning my bike because research showed it was only a matter of time before the speedo crapped out - and it did.
At 3000rpm (in any gear except 1st) is going the same mph as the gear x10. e.g. 3,000 rpm in 3rd is 30mph, 3,000rpm in 4th is 40mph, 3,000rpm in 5th gear is 50. 3,000 in 6th gear does NOT make for a happy V11.
In 5th gear 5,000rpm is 80mph. 6th gear at 5,000rpm is approximately 90mph. I would estimate that 6,000 is in the triple digits .
Since mid-June I've done about 5,000 miles of trouble free riding on those figures. However, I've finally purchased a replacement speedo cable/drive because the bike feels REALLY good around (and above) 6,000. All vibes go away and it just rides beautifully. Without the speedo telling me how fast I'm going it's way too easy to justify that good feeling instead of slowing back down.