silencer support brackets

Early P11 in bits from the US. Frame arrived already powder coated, so dismayed at my own stupidity to notice , after fitting engine , gearbox and front forks that those small but significant silencer brackets were absent!
I know of no other P11 owners in my neck of the woods , so no reference as to positioning of these brackets which I imagine is critical if you want the pipes in the right place , avoiding primary casing , side panel etc.
Can any body please give me an accurate measurement between the rear shock top bolt centre and the bolt hole centre in the silencer bracket?
I have one measurement supplied by Anthony Curzon which is : 8 5/32" or around 207.6 mm, I would like that verified before I go mad with the sif welding.
Many thanks in advance!

Will said:

My P11 is an early one, 121242 March 1967. My measurements confirm that by Anthony Curzon who would know. Might be best to check what welding can be used, I understand that they can only be brazed due to the type of tubing? I’m not an expert.

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Will, thank you! I'm grateful to Anthony, I just needed an independent measure up to be absolutely sure.
Mine is also March '67 121079.
I've found a cycle frame builder not too far away with the traditional skills to Sif bronze weld the lugs to the frame. Reynolds 531 tubing needs careful handling!

where are you based,

nimrod said:

where are you based,

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Deepest South Somerset... No P11s registered with the Bristol or Bournemouth branches of the Norton Owners Club. Anthony Curzon has been very helpful, but it would be nice to see the real thing for comparison.

I had mine at the Somerset festival of transport for the last 2 years. I live near Portsmouth so not that far away. I know of 5 or 6 in my area. mine is in the prototype colours. the picture attached to my profile was March in this years Norton Owners Club calendar.

nimrod said:

I had mine at the Somerset festival of transport for the last 2 years. I live near Portsmouth so not that far away. I know of 5 or 6 in my area. mine is in the prototype colours. the picture attached to my profile was March in this years Norton Owners Club calendar.

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I joined the NOC too late to receive the calendar, but I've admired your bike in the P11 'readers rides' thread, very nice looking bike!