Is that a "Melvyn" seat? If it is, then I've gotta one that I bought second hand...and it ain't no better than the original in my, lardy, opinion.... If it isn't..then pleas accept my humble apologies..
Put a 'Melvined' seat on both my 1150 and 1200. Top mod IMHO. Rode from Marbella to Bilbao (650 miles if you include getting lost in Madrid) in one day last week. No problems in the rear end department!