Last year I put a new motor in my dad's KLR after the engine chewed itself apart. I was surprised that the 2003 engine that I purchased was more expensive than the Versys engines that I was finding. I would bet that a solid KLR engine could be sold to cover the cost the Versys engine, and some of the modification work.
However, I can't recall if that price included throttle bodies and ECU or not.
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