The Ciao Workshop manual goes on to state:
<i>...normally impossible for the setting to be incorrect. The exception to the above rule is when the contact breaker points or fibre heel become worn...</i>
You <b>do</b> need to set the contact breaker gap.
The workshop manual says:
<i>If the contacts are in good condition, measure the gap using a feeler gauge. A 0.4mm (0.015 in.) gauge should be a light sliding fit (the points <b>must</b> be within the range: 0.35 - 0.45 mm (0.013 - 0.017 in.)).</i>
Hope this helps!