This is another good topic for noob wrenches or the generally misinformed. Putting oversize rings on std bore piston won't fix your problem. Bores wear egg shaped from thrust angle and more at top giving it a taper. That spells disaster for anyone trying to get by with just buying rings. Even with an overbore, the smaller piston will rock, slap and never seal. Bottom line is their are no short cuts when it comes to restoring lost compression due to worn rings, pistons and cylinders. Getting to be a moot point as most new engines are being cast with the least amount of metal needed and rarely will tolerate any oversize machining.
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