Reply To: When is a hone job needed?

[Don]

Does the scoring match up with either the exhaust cover or intake covers? If so, pulling these covers will give you a better idea of how badly the piston might be scored of if the rings are stuck in that area. Would it be possible to post some pictures? Seems like you have a 10PSI difference between the cylinders, which is a concern on one of these small/low compression engines….
In any event, using some light emery/crocus to rough up the walls a bit and remove any aluminum transfer might help out, certainly worth a try…Simply rinse the cylinders well with WD40 or some light spray cleaner/lube afterwards.