Hi Taztiger,
The fact that your bike is a mixture may cause you a few problems in the headlight / instrument area.
Norton s/line featherbeds used two different widths of fork I.e. 7inch width to 1964 and 7 3/8inch with steering lock thereafter. The fork width impacts the clock mounting so I'll summarise my (not necessarily perfect) knowledge of the specs.
To 64 - chronometric speedo recessed into the black painted headlight shell with holes for a light switch and 'letterbox, type Lucas ammeter. A chronometric rev-counter was an optional extra and mounted on a separate bracket under the fork nut (usually on the timing side but some dealers/owners mounted them on the opposite side).
65 to 66 - same arrangement as above but with 'grey face' magnetic clocks
66 on - clocks remounted on a single plate (7 3/8 in centres) together with the light switch. The headlight shell was changed to a black painted one with only an ammeter hole. (A warning light holes may have been added later)
The above relates to bikes with magnetos.
Other relevant points are that the chronometric speedos read to 140mph (i.e. 20 mph faster than a Bonnie!) so I suspect the same applied to the magnetic clocks.
Green globe clocks were introduced with the Commando and to the best of my knowledge never fitted to the featherbed bikes.
Hope this helps. If you need any further information I can probably dig it out.
Graham
1964 650ss owner
