Darrel's on to something there. I think your frame #'s would be a big help on getting them close. I have an early, a mid and a later K1 Z engine and 1 or 2 K2's. I know there's a couple I want to keep but don't remember which ones. Given a little time, you'll get exactly what your bikes need/ deserve. I'm sure you know the K1 Z should be the easiest. If the others pop up right away that would be awesome.