OK, not on the SV, but on the Aprilia.
Ape is not quite as uncomfortable as the SV, but still get the ache after 90mins or so.
I am to tight to pay for a Corbin or Seargent seat, so sent mine off to Bootleg Bike seats in Preston, added 1" of extra padding & re-covered in 2 colour, am well pleased, much better for 150 mins at one go, looks great & real cheap considering, only £50+ postage, to me that was a bargin.
Look them up on the web, have plenty of photo's to look at, they will do whatever you want.
Only a small old-fashioned company, but very helpfull to me.
http://www.apriliaforum.com/forums/s...d.php?t=214354
check out the link for picies.