Join Date: Jun 2010
Location: Alberta, Canada
The KLR has a pretty unique sounding engine to begin with, but if it was ran out of oil, it could sound even worse!
Best way to check for oil starvation damage is to pull the valve cover off and check the camshafts/caps for galling and discoloring. If everything looks good up top you might be fine. If not, at least you know what you've got.
As was already said, and you might have known already, the oil has to be checked with the bike balanced level or the site glass will be empty. Hoping it was just on it's sidestand and there was actually oil in it. Wishing you the best of luck with it, I like happy endings better than sad ones!