Yeah.....those do look a little 2 stroke ish. But in a 2 stroke those holes are also suppose to line up with ports
Back in the 70's we knife edged the rods, stuffed the crank with cork, reed valved em, trimmed the piston skirts and we knurled the pistons. My Dad use to love to grind some stuff off.....I remember we had a little Honda mini bike (4 stroke) that we put a stroker crank in, and I can picture my Dad now grinding on the rocker arms to remove weight. All seat of the pants stuff.
Mike.....bike is looking good.....