Hi there, Sorry for the delay.........Not only have I been very busy getting that racing twin Norvin back together plus the series "A" s I'm playing with, but just been in NZ for a week catching up with family. I'll get those measurements for you, but I do remember that the width of the case halves is different by about 3 mm as well, so this means that the spacers on one side are slightly wider than the other side and this follows through to the front engine plate to frame spacers as well. Cheers...................Greg.
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