Why is there no 750 Mk III Roadster??

750 mk3 or 850 mk3. There are definitely roadster 850 mk3's and the 750 roadster was a later addition after and modelled on the 750S.


Roadster

Norton Commando 750cc Roadster
In March 1970 the updated S called the 'Roadster' was introduced. It had a low-level exhaust and upward-angled silencers with reverse cones.[9]

A Mk2 version was introduced in 1971,[14] and in 1972 the Combat engine and front disc brake were fitted.[18]

In 1973 the Roadster was available with the 850 engine, initially as an option but from October 1973 as the sole engine.[23] Production of the Roadster continued until 1977 when manufacture of the Commando stopped, although few Roadsters were made in the final year.[16] The Roadster was the most popular of the Commando models.[35]
 
Because Fastback and Roadster timelines are not the same at the beginning so the mark numbers don't align. The Roadster wasn't introduced until approximately 3/70 lasting to approximately 12/70 after which it became Roadster II from 1/71 to 12/71 when it jumped to Roadster IV in line with the Fastback IV and new Interstate. So technically the MkIV Roadster should have been MkIII.

Why is there no 750 Mk III Roadster??
 
Because Fastback and Roadster timelines are not the same at the beginning so the mark numbers don't align. The Roadster wasn't introduced until approximately 3/70 lasting to approximately 12/70 after which it became Roadster II from 1/71 to 12/71 when it jumped to Roadster IV in line with the Fastback IV and new Interstate. So technically the MkIV Roadster should have been MkIII.

Why is there no 750 Mk III Roadster??
Now I know 😊 many thank Les, I can sleep soundly
 
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