I have a Z750s that was only imported for 2 years, and the seat is terrible. There aren't any aftermarket options- not Corbin or Sargent or even Seat Concepts. I took it to a local upholstery shop that has re-covered seats for me in the past, but he's basically a car guy. It got better after he worked on it twice, but it needs someone that really knows what they're doing with a motorcycle seat. PFA, TIA.