Norton motorcycle englne and frame dating
I can’t comment on the accuracy of this diagram as I’ve not needed to find the frame number on a bike from this period yet.However, the diagram is from the same source as the one above which I know to be correct so I have no doubt that this illustration is also accurate too.For reference, you can just make out the edge of the oil tank lid at the bottom of the picture and the back end of the petrol tank on the right.For the 19 Matchless and AJS models, the frame number location moved from under the seat to a more readily accessible location nearer the front of the frame.Come and see how we hand build British motorcycles at Donington Hall.Tours take place Fridays at 3pm, the tour will take up to 90 minutes depending on group size. £10.00 donation payable on the day, all proceeded go to Blesma Few other motorcycles offer such a personal and unique experience.
Hopefully this should give you a pretty good idea of where you should be looking and the sort of thing you should be looking for.Like before, stand on the right-hand side of the bike and look at the right-hand front down-tube, below where the forks attach but above the top engine mountings.Now that you have hopefully found the frame number of your classic Matchless or AJS motorcycle, the other important piece of information which you’ll probably want to check against your log book is the engine number.The arrow in the figure on the right shows roughly where you should be looking.
Standing on the right side of the bike (as viewed from the seated position), look up under the saddle to the back-end of the top horizontal tube just in front of where this joins the down-tube and the seat bolts into place.
Hopefully though with the help of this article you should be able to locate the correct, unique frame number on your AJS or Matchless motorbike in order to be able to verify it against what is recorded on your registration paperwork.