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CB550K3 oil control ring problem.

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Ashdowner:
Need help again with my 550 build. Just got some new rings from DS for my CB550K3 with standard bores. The two top ring gaps are fine. The oil control rings (top and bottom) fit in the bore and the gap is fine - as long as the spacer isn't there. Put the spacer in and there is no way they fit the bore, either using the old spacer or the new spacer. The problem seem seems to be twofold. Firstly the new rings are 2.24mm thick whereas the old ones were 1.94mm (so I'm assuming they've worn down). Secondly, the internal diameter of the oil-control spacer is not the same as the diameter of the ring groove, i.e. with it's end butt jointed it actually holds the rings out from the piston and doesn't allow them to compress enough to get them in the bores -that was also true of the old spacer but of course with the thinner rings the pistons fit in the bores. The logical answer is that I have to gap the spacer such that it is a snug fit in the groove and allows the rings to fully compress. Is that indeed the answer please because I've never encountered that before? I'm also surprised that the existing oil control rings are 03mm thinner than the new ones from DS because if they've worn down from the original new size then as I've now found out the pistons wouldn't have gone into the bores. Surely nobody could have shaved 0.3mm off the circumference of the rings

Nurse Julie:
Could it be that the spacers supplied by DS are incorrect ?. Are they OEM or repro / replica ?

Ashdowner:
I doubt it, because the spacers are the same size as the old ones that were in. It's such a strange situation when you find that the only reason the old rings fit in the bores with the spacers was that they  are much thinner than the ones I've received from DS. That's why I ask if the logical answer is to gap the spacers so they match the diameter of the groove.

Ashdowner:
Where's BryanJ when you need him?

Bryanj:
never had that problem, sounds to me that they may be incorrect to part number

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