Very troubling, but do you think this is partly your fault for
not checking the position of the piston, since it was a
known problem on the early engines? There are several vids
on the net that advise checking the position on these.
I think bicycle engines owes you a new engine.
And therein lies the conundrum at the time when I bought it, I purposely, at that time, did ask if taking things apart would void my 6 month warranty and was told that it would...With that thought in mind, when I sent my email yesterday for them to see Monday morning, that is the platform I am standing on since this factory goof and the resulting failure could have been averted if only they would have let my warranty stand in good faith by allowing me to do this very thing....Its called damned if I do and damned if I don't...lol.
Earlier cylinders had the intake port opening placed higher on the cylinder, that made carburetor clearance of the clutch stand off better. On some of the newer cylinders the Bofang carb doesn't clear.