Interchangeable engines for 2001 KX125
My engine is locked up, so I'm looking for a spare until this one is rebuilt. Can anyone tell me what years are interchangeable with my 2001 KX 125? Also, I'd assume I have to get the complete engine with carb, etc. Is this an accurate statement? Additionally, can you tell me what bottom-ends will work with a good 2001 jug? Originally, I thought the '99 to '01 were interchangeable tops and bottoms. However, today a mechanic told me the '01 jug is different than the priors. He said it is the same through '05. So, does this mean that I can interchange with up to an '05 on my frame?
Any help or insight would be greatly appreciated. Thanks!