1956 Imperial Vs Metric

Discussion in 'Newbies Hangout' started by John Whatsisname, Oct 11, 2023.

  1. John Whatsisname

    John Whatsisname New Member

    Sep 24, 2023
    2
    3
    South Africa
    Some of the nuts and bolts on this bike have been messed up over time. Ie. Wrong spanners resulting in rounded heads, threads stripped etc.
    what is the general feeling about replacing tired nuts, bolts and threads with metric? for instance, The carb (Amal) has two different size fixing bolts. I a considering 8mm bolts and threads. These will probably be better.
    any views would be welcome
     
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  2. speedrattle

    speedrattle Senior Member

    Feb 19, 2021
    1,154
    243
    appalachia usa
    the old threads will be whitworth ? and CEI. you cannot thread a modern bolt into the hole, either metric or SAE. through bolts like motor mounts are where you can do what you like. i use modern NF SAE on everything i can
     
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  3. littleade

    littleade The only sane one here
    Subscriber

    Mar 17, 2015
    255
    1,000
    Worcestershire
    When I restored a BSA years ago I just bought new stainless imperial nuts and bolts so of you can get those that's what I'd do.
     
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  4. John Whatsisname

    John Whatsisname New Member

    Sep 24, 2023
    2
    3
    South Africa
    Thanks for your replies. Note I am becoming more familiar with this site I will e these discussions to the technical area.
    @littleade where did you get those SS fixings?
     
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  5. joe mc donald

    Subscriber

    Dec 26, 2014
    14,421
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    slough / burnham
    John Whatsismore
    Try [email protected] i have always used them. But i am sure you will find someone closer to your home.
    Joe
     
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  6. littleade

    littleade The only sane one here
    Subscriber

    Mar 17, 2015
    255
    1,000
    Worcestershire
    Sorry, it was a long time ago so I can't remember other than the company was in Redditch, England. Best you can do is search the internet for what you want
     

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