Thanks a lot for the replies, that's very helpful.
I've been looking into this a bit further, because to be honest I'm a bit puzzled as to why I find my seat to be a bit too high, given that I'm nearly 6' tall (I get the balls of my feet down on both sides, but not flat feet). I've got to wondering whether my bike might actually have the tall seat option? I've just been out to measure my seat height (presumably you do that at the lowest point of the seat? and obviously with both wheels on the ground) and I come up with 890mm. Now as far as I can ascertain, the published standard seat height for the 2013 DL650 AL2 is 835mm, +/- 20mm for the low and high seat options. So mine is apparently a full 35mm higher than the even the high seat option! My seat's certainly an unmodified Suzuki one as far as I'm aware? (pics attached).
Can anyone shed any insight on this oddness?
PS Apologies for the inverted photo: it's correct on my computer; and if I rotate it upside down before uploading it still appears upside down here! WTF?