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Doesn't look right to me. It's probably not the right bearing. You might need a 36° angle one or a thinner bearing.
Thanks, suspect this is the most likely cause. Can't find any spec sheets - may see what cartridges are in my bikes to try.
edit: the cartridge is certainly correct for the top cover (M-Part)... it appears someone has tried to stick half an M-Part headset on top of another non-matching cup. Brilliant.
Doesn't look right to me. It's probably not the right bearing. You might need a 36° angle one or a thinner bearing.