I dare entering a CONTROVERSIAL AREA!
IN MY OPINION, a conventional compression test on a KLR650 engine yields questionable results regarding ring and valve condition, unless historical compression test data is available for comparison.
Because KLR 650s have KACRs (Kawasaki Automatic Compression Releases). These devices crack an exhaust valve at cranking rpm to facilitate rapid initial spin-up (if you know what I mean
). Since the initiating angle of KACR activity remains imprecise, Kawasaki publishes a WIDE RANGE of acceptable compression test psi values.
Then, what to do to obtain more meaningful compression (ring-and-valve condition) information?
A. Disable KACR, perform standard compression test, compare value with typical engine compression psi values, or:
B. Perform a leak-down test.
Again, my caveat: Controversial issue, debatable opinion expressed; regardless--no offense intended anyone. And, as always: YMMV!