A strange request but is there anyone in the london area with a S4R My partner has just sold her SixtyTwo scrambler and is looking at a S4R but its in the North of England and just wants to sit on one and see if its too tall and how it feels. Should only take 5 minutes if someone has the time and the bike.
Is junction 12 of the M1 in Bedfordshire too far for you ? Also my bike is an S2R1000 which I believe is identical for seat height etc, just a little lighter as not water cooled. I`ve just taken it to be serviced this morning but it will be back next week. So apart from being a different bike, an hour from London and not actually available for a few days its perfect !
I find this to be very helpful in that you can get a very good idea of comparison by dowloading the bike you want vs the bike you are used to and flicking between. Of course, nothing beats a test ride... http://cycle-ergo.com/
Perhaps with the recent scammers on this forum, please take care with all the necessary precautions who you invite into your own home.