As @Dombo is saying you're pushing too hard for a daily mileage.
Personally I would avoid France as much as possible and go via Belgium. Better roads and less maniac drivers.
Aim for 50 to 70 miles between stops on such sporty bike.
Stop as soon you start feeling uncomfortable on the seat. If you try to go a bit further, you only get tired quicker and will take longer to cover the distance.
I will be surprised if you can do more than 500 miles (top) a day. Count with heavy traffic for long periods and remember not only the UK have lots of roadworks.
When I did the Scotland - Croatia tour last year on a more touring dedicated bike than a cbr I never did more than 150 miles on a stretch and we're talking about a far more comfy bike. Still took me 3 days to get there.
Luggage, take only essentials and cut them in half. Any extra weight is dead weight that will slow you down.
Finally, maximize the range and try to fuel when stopping as much as possible.
Refueling stop won't count as rest as you will notice.
Other than that, I hope you have a blast