The concerning thing is that the owner of the shop, who trained the mechanic used to race bikes, as I said in my previous post, and I was referred to them by some other guys after a bad experience that I had at another bike shop. Also, he did say that he had never heard of it before on a KLE.
I was wondering. When I had the gap set in September, I was advised, and I got a few confirmatory opinions, to run 1 tank of fuel with valve ease in it to burn out the carbon buid up that may have collected around the valve seat, stems etc, with the valves not closing properly.
Due to financial reasons, I was only able to do this about 3 weeks prior to the second episode of this problem.
I was wondering if, perhaps, when they set the valves in September, there was a carbon build-up on the valve seats, and then after using the valve ease, when the carbon was gone, there was again a gap around the valves.
I dunno if it's possible.