Join Date: Nov 2009
Location: Lander, Wyoming
Chances are about 50/50 IMO, that any used head that you purchase will still need a proper & complete valve seat re-conditioning, new valves and valve seals. So I don't see that you would save any money as compared to an Engine Dynamics complete repair.
If you purchase a used head, one Must also receive the matched camshaft bearing caps which were machined with that head originally. This Can Be the reason the head is for sale, one maybe broken! Be careful.
1987 thru 2007 are mechanically identical, other than paint. The 2008 thru 2018 will need a little AIS block off plate near the spark plug. (EM sells them.)
Modify at "YOUR OWN RISK"!
Still riding my 1987 KL650-A1. 84,000+ miles & counting