I have to tell you this is a great site. Because of the information here, I did not make a mistake and purchase an IMS tank and seat combo. I had previously owned a IMS tank on a different bike and it was anything but a bolt on fit and when I read here the seat was 1" taller, it wasn't even an option. The SDG seat I got is very, very nice . It works great with the YZF tank. No money wasted here! My next effort will be to fix the jetting for half throttle. The bike really hates it there I'm afraid. Bryan, maybe a link to SDG could pay off?