From what Im being told, the 96 ran good, then he dropped a small part down inside the crank case (if thats possible) from the power valve. He split the casesto remove the part, and it ran good for a minute, then "oil got sucked into somewhere that it shouldnt have gone", and the bike quit. Other than that, the 96 is a good bike (I want the wheels and suspension off the 96 for a summer set up).
The 93 has a bad motor (wouldnt figure on much being good on the motor between the carb and the pipe, again havent seen it), and the frame is junk. The 93 has good wheels, suspension, tank, carb, seat, etc.
Chris