I have run into a deal that I kind of like. I found a guy selling a project bike he never had time to work on for $400. It is a 1003 Ninja 500, red, good body, not running. He says it turned over before but he was changing a plug and he ripped a wire of some kind. He is selling it to me for 300. Even if it's not worth it I may buy it just to have. My friend who rides had the idea of me buying the bike and then swapping out the motor for his Ninja 636 motor. I thought that sounded awesome but I kind of got a little head of myself in thinking about it because I didn't even know if they would mesh together! So Here I am asking you guys if a 636 motor would fit in a 93 Ninja 500? All of me wants to hear it will fit but part of me has a feeling it will not. Thats the kind of luck I run into.