I do not think Honda will give wrong figure in manual.
Because they still quote stroke as 41.4mm for cd 70. Chondaz have very long stroke of 49.5mm.
So installing a chonda cylinder in Honda is impossible unless real stroke of Honda is49. 5mm which is unlikely.
Head of chonda and Honda is not same at least valves bigger in chondaz. And have different combustion chamber.
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