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Sealing the bores are a low-friction 0.043-, 0.043-, 3/16-inch ring package. The top rings are gapped at 0.022 inch, while the second rings check in at 0.020-0.022. In theory, running relatively tight ring gaps and bearing clearances, in conjunction with a standard volume oil pump, prevents oil from slinging around in the crankcase and into the combustion chamber. Combined with low-tension rings, Smeding reports that these tricks are good for a solid 25hp increase.