Hi everyone, I'm new here and I searched all the threads and many other sites, but I still can't find an answer...... I just bought a KX 250. The VIN tells me that it is from 1988. The former owner told me the guy he bought it from put a 1999 motor in it. I'm trying to find out if it is actually from 1999 or some other year so I can get parts if I need to. I figured out they put a carb on that should be for a 1989 a PWK 460. The Carb. for a 1999 is a PWK 490. I am having slight carb problems right now.... but what I really need to know is if there is any ID numbers for the motor, and where to find these numbers. Thanks for any help I really appreciate it.