Join Date: Nov 2009
Location: Lander, Wyoming
That all depends on your engineering and welding skills, or your check book.
There are owners which have installed the fuel injected 2 cylinder Ninja 650/Versys 650 engines into the KLR 650 frames. And I've also seen 1 or 2, 4 cylinder Ninja 1000 or GSXR1000 powered KLR 650 frames. And I have also seen a Ducati L-twin engine stuffed into a KLR 650 frame. So a DR650 air & oil cooled single cylinder might be relatively easy for them owners.
But I can guarantee you that it would be impossible for me, with my skill set and only my own 2 hands.
Modify at "YOUR OWN RISK"!
Still riding my 1987 KL650-A1. 83,000+ miles & counting