Looking for a replacement engine for my 07 and I found a good deal on one that looks to be right, but the guy doesn't know what year its from. I've been searching and it seems like most from 07-11 engine numbers start with zx600pe. It seems like they both use the same case and maybe cams are only difference?? Is there any physical distinction between the two that can easily be used to identify it without opening it up. the engine number is Zx600pe000692 for the one I'm looking at.