ETS, I too don't know where your coming from. I'm 5"11 and have a 98 Zed (bought it new and plan to keep it for several more years as it's been a great sled). I find there's plenty of room on it and I have never had a problem with my knees hitting the bars??? If I stretch right out to a comfortable position I'm still not at the back of the seat let alone on it (I too ride up on the tank when riding aggressive and it's never been a concern?). If you think space is limited on the CK-3 you should try an Indy wegde!