Is there a simple way to identify a combat engine.
I have a Commando 750, which was built September 1971. engine/frame number 152100 and I have never been sure if this is a Combat or not.
The engine was rebuilt by a previous owner, so I can't be certain about the originality of some parts.
I understand there should be a letter C near the head steady, but I cannot see this. Where exactly should I be looking?
Any help would be appreciated.
It's not a Combat, at least…
It's not a Combat, at least not a factory version, the engine number is far too low/early.
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Thanks for the replies Steve…
Thanks for the replies Steve & Mark.
This engine has puzzled me.
There is no "C" stamped on the head, it has the crankcase breather at the side, and the large Norton sump plug. All of which, with the serial number, suggest pre combat.
However, the gap between the head and barrel is reduced, which suggests high compression, although there are no machining marks on the head to show it has been skimmed.
Plus it is fitted with 32 mm carbs, when I thought the standard for a 750 should be 30mm. I also have what appear to be the original carbs which are also 32mm.
Thanks again for the replies.
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There was a combat option in…
There was a combat option in the sales price list prior to the 72 model year. It's referenced in Roy Bacon's book on Norton Twin with a cost but no details of the specifcation, my guess is that it was for an engine built with the current stage 1 tune and only for prospective racers.
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