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XS400 SPECIAL PISTON RINGS


MUD707
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I have a 81 XS 400 with bad rings. I tore down the top half of the engine to change them, but the size isn't marked anywhere on them. I was wondering if anyone knew what size the standard piston or rings are. I miked the piston and I am getting 68.8 to 69mm is that the standard or is it oversized?

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I have a 81 XS 400 with bad rings. I tore down the top half of the engine to change them, but the size isn't marked anywhere on them. I was wondering if anyone knew what size the standard piston or rings are. I miked the piston and I am getting 68.8 to 69mm is that the standard or is it oversized?

69mm is quoted as standard, so iwould assume you are on standard. the overbores go up in .25mm increments

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