Francis-Barnett Owners Club Forum

Welcome to The FBOC Forum which is open to all, but you must become a registered member, there is no charge for registering. But please remember the Club cannot exist without paying Members, so please consider joining the Club as a full paid member and help keep the Francis-Barnett name alive.

Joining the Francis-Barnett Owners Club could not be easier. Goto the club's website www.Francis-Barnett.co.uk
To join on-line click on the "Join On-line" button in the menu at the top of the page.
For those that would like to join in the traditional way again goto www.Francis-Barnett.co.uk and scroll down to middle page paragraph titled "Join the Club" just click on the learn more link further below and print off the application form. All information is contained in the form with address and membership fees.
Come and join one of the most friendly classic bike clubs around and help to keep the Francis-Barnett name alive.
Francis-Barnett Owners Club Forum

The Forum of the Francis-Barnett Owners Club. Keeping Alive a Living Legend.

Latest topics

» green paint colour
Model 95 / Amc150 - real head scratcher  EmptyYesterday at 7:28 pm by wilson44153

» Plover Log Book.
Model 95 / Amc150 - real head scratcher  EmptyYesterday at 9:22 am by Falcon 58

» New member
Model 95 / Amc150 - real head scratcher  EmptyMon Nov 11, 2019 7:41 pm by Daminutt

» frame number
Model 95 / Amc150 - real head scratcher  EmptyThu Nov 07, 2019 1:34 pm by wilson44153

» Falcon 62? owner in Tampa, Florida
Model 95 / Amc150 - real head scratcher  EmptyTue Nov 05, 2019 10:32 am by stuart elkes

» Model 95 / Amc150 - real head scratcher
Model 95 / Amc150 - real head scratcher  EmptyMon Nov 04, 2019 8:15 am by kerabo

» 9e gearbox main shaft.
Model 95 / Amc150 - real head scratcher  EmptyTue Oct 29, 2019 9:45 pm by GrahamN

» Barnett & James
Model 95 / Amc150 - real head scratcher  EmptyThu Oct 17, 2019 10:03 am by Bola

» Francis Barnett Merlin L51 in Oz
Model 95 / Amc150 - real head scratcher  EmptyThu Oct 17, 2019 9:22 am by Donkeyhead


    Model 95 / Amc150 - real head scratcher

    keith livingstone
    keith livingstone

    Posts : 89
    Join date : 2012-11-25
    Age : 61
    Location : Northern Ireland

    Model 95 / Amc150 - real head scratcher  Empty Model 95 / Amc150 - real head scratcher

    Post  keith livingstone on Sat Nov 02, 2019 9:10 pm

    Hello all
    Hope I'm right in thinking modern FB means post war and not just new FB's as recently marketed.

    A real head scrather - 6mm threads!!
    Would appreciate some expert advice

    Much against better advice I took on this neglected model 95.  When working on these old bikes it's always a nightmare checking and fixing botched threads.  There are so many variations of imperial threads, but this AMC 150 has me scratching my head.
    There are 5 screws securing the inner primary chaincase.  I have several crancase halves into which foilk have tried 1/4 bsf and 1/4 cycle.  I have one unmolested crankcase half with original screws which, and this is where I'm bowled over are the from what I have checked are 6mm threads  See pictures

    Many thanks
    Keith

    Model 95 / Amc150 - real head scratcher  Fb95_010

    Model 95 / Amc150 - real head scratcher  Amc15013

    Model 95 / Amc150 - real head scratcher  Amc15010
    avatar
    Rex Stewart

    Posts : 79
    Join date : 2017-09-21
    Age : 69
    Location : Aberdeenshire

    Model 95 / Amc150 - real head scratcher  Empty Re: Model 95 / Amc150 - real head scratcher

    Post  Rex Stewart on Sun Nov 03, 2019 7:39 am

    Could the thread be UNC and UNF.

    One of those is close to Metric.

    The Ariel arrow was UNC/UNF, Norton also used UNF.
    kerabo
    kerabo

    Posts : 2733
    Join date : 2008-02-11
    Age : 69
    Location : Falcon 87..1936 Cruiser 39. Falcon 81 Green Lane bitsa. Sunbeam S8. Honda Deuville.

    Model 95 / Amc150 - real head scratcher  Empty Threads

    Post  kerabo on Mon Nov 04, 2019 8:15 am

    Can you get a picture of the thread. Into alloy it's practice to use a coarse thread but I have never touched one of these.
    The older engines were I think Whitworth and UNC is close to this.
    Ken

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    Model 95 / Amc150 - real head scratcher  Empty Re: Model 95 / Amc150 - real head scratcher

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