Red: Hard Hone

Figured that if changing the rings made absolutely no difference, then it must be the cylinder itself that was at fault.  I remembered seeing score marks (running straight down the length of the cylinder) last time it was out.

So pulled the jug off again today.  Checked the piston gap on the top ring and it was well within spec at .254mm to .305mm.

But definitely saw the same straight line score marks.

Tried going at it with the 48mm Flexhone to try to smooth it out, but that didn't seem to do much.  Switched to the bigger 51mm which was tricky to keep moving at a constant speed (it kept getting stuck) but eventually got to a rhythm once the balls had worn down a bit.

Couldn't really smooth out the scoring, though, so they must be in there pretty deep.

On start up, there was no smoke, but I only let it idle for a minute as I want to seat the rings before anything.  The lack of smoke may just be because the oil hasn't had a chance to work its way up into the chamber yet.

We'll have to see after we do a few runs.