ORIGINAL: proptop
I would pull the head and backplate off and give it a good visual inspection for swarf (machining debris ) and flush it out with "jet spray" type carb cleaner. Use Q-tips to clean all the little nooks and crannies too...You'd probably be surprised at how many new engines have some sort of swarf in them.</p>
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If the scratches are not in the sleeve and ring, it should be OK.</p>
So far I don't see any scratches on the ring. But I like your suggestion. It's only a $100 motor. I could tear it down and do some port polishing. Take out the scratches on the piston with some Scotch Brite crosshatch style and shorten the rear piston skirt to allow earlier fuel entry? This is a piston/port timed 2 stroke right?
