Whats your skirt-to-wall clearance after machining?
What was your ring end-gap?
Cast and forged pistons require different skirt-to-wall clearances. What kind of pistons, rods, rings, and crank were you using?
What was your rod brng clearance and rod big-end (side) clearance? What was crank end-play?
All these things affect cylinder lubrication and piston fitment.
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