The numbers are very close at mine 1256/665.

396, sold to Japan

Nice Z1 the NY 🍖🍖🍖🍖

The Vin/Engine spread is an old story for many of us.

It's a drill into our brains.

In this forum we found a lot of answers to all of our doubts and questions that perhaps do not even put the designers of this bike that we love.

Yet we always return to the same question mark.

In 2008 I bought a sandcast by Chris, the 1256 / E665, a bike with a big spread.

Yet the engine was never out of that frame.

After some time Chris contacted me and told me that this was the right engine of the motorcycle.

That probably there is a matching list of Numbers that someone owns and perhaps has no interest in disclosing it.

We certainly our bikes have a unique feature, the engines can not be cloned, which in the world of collecting is done quite often and this is an irrefutable fact.

So I believe the spread is something quite natural and that occurred probably due to organizational reasons at a time when there was a growing interest in the market and that, probably, sent into a tailspin a major corporation such as Honda.

Riccardo

here are 2 of My 3 sandcast bikes, also with casting date:

Retirement is not always a good time especially for those who worked with passion and his work has been a very important part of life.
There  is 'a time for everything, what matters is' be calm, and finally be able to devote to the passions that have no age, as our passion for motorcycles and engines in general.
 Sometimes I feel a little tired after 41 years of work, but it still takes 7 to 10 years, unfortunately the laws are not clear in Italy, I will consider it as a wish for long Life.
Have a good retirement Steve and a good Life.

Great BIKE, survived well.
Please post more photos, in detail.

r.

Bo,
it is a pleasure to read you.
Riccardo

Merry Christmas from Italy.
Riccardo