Maintenance & Technical > KX500 Original

Differences in KX500 motors

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witdogg:
Hey guys, first post.   :mrgreen:

Does a 89 and newer KX500 motor have the same motor mounts as the 87/88?

Is it a bolt in swap?

RoostDaddy:
I believe its an easy swap as the head stay brackets are the only thing I know that are different.  You may just need to fab up a new set of these.

don46:
bottom motor mount is narrower than the newer ones, I think.

witdogg:
Thanks guys.

Does anyone know for sure?

toomany:
I put an 87 motor into a 92 frame. The bottom mount and front mount lined right up and were the correct width. The one with the swingarm was even in the right spot. I had to fab up some spacers for the shock linkage, but I was using the 87 swingarm on the newer frame/shock. The cylinder head stay had to be fab as well. I could get it to bolt to the head and hit one of the two holes on the frame, but not both.

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