I have very recently purchased a 1949 ES2 with a cast iron barrel. I keen to source a good maintenance manual as am so new to this. Can anyone advise please.
I got a photocopy BMS document from the National Motorcycle Museum. "Maintenance and Instruction Manual" (ref 2938) which covers singles and twins from '48 to '60, over 200 pages and very useful. I find the spare parts list very useful also. I got mine from the same source but it is for '51 to '54. There may be one for '49. There's also a Haycraft/Clymer "The Book of the Norton 1938 - 1956". Also useful even though a lot of it is identical to the maintenance manual.
Thanks Mark, I'll contact the National Motorcycle Museum. Apprecaite your help.
.. if the one Mark mentions is the "official" one by Edgar Franks (a designer at Norton) but that is my bible. This is it: https://www.nationalmotorcyclemuseum.co.uk/product/norton-1932-to-1949-all-models-pearson-maintenance-repair-manual-by-e-m-franks-comprehensive-carroll1134/
If you become a supporter of the NMM you get a free BMS reprint every year, as well as unlimited free entry to the museum. A bargain!
BTW all ES2s had iron barrels and all (except the 500T) iron heads up till the mid 1950s.