Ok, I see nothing wrong with that cylinder. The only scratches I can see from the pictures appear to be cross-hatching. Cross-hatching like a new cyliner. Snap gauges and an outside mic are the best way to measure piston to cylinder clearances because it eliminates the bias error of the micrometer. I listed all of the other possible tools that would work, but a caliper won't because you can't measure deeper into the cylinder where most of the wear occurs. Visually, I see no reason he can't put a new piston in and reassemble. For honing, cross-hatching does give the piston rings a little something to wear into. It's not really necessary to hold oil like a 4-stroke, though. The most important reason for honing new 2-stroke cylinders at the factory is to fine tune the bore diameter. Instead of saying WRONG all of the time, lets discuss these things. You don't seem to be right all of the time, either, Fox. It seems that some shops hone and some shops don't. I know it's not a very wide demographic, but the 2 Honda dealerships I have been to don't hone. The third party shops all do.