The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => Frame => Topic started by: Peter in Aus on 19.10. 2020 02:43
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Hi all, Dose anyone know what the difference is between 42-4359 1961-62 crossover brake arm and the 42-4350 1956-60 arm?
I need a crossover brake arm for my 58 S/A project and I can get the later one ok but don't know what the difference is.
Thanks
Peter
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Hi Peter,
I have a spare splined shaft (from a 1960 SR).
Do a deal; if you come to Orabandon 2020, it's yours!
Richard
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I think the difference is whether the brake drum lever is pointing upwards or downwards, or in other words, the cable lug on the frame is positioned higher or lower. This would be for the cable running above or below the swingarm.
A ‘58 frame would have the frame lug in the higher position and the drum lever pointing upwards. I believe that this was changed around 1960.
If you’re looking for the earlier type there’s one on eBay;
https://www.ebay.co.uk/itm/Ariel-BSA-Rear-Brake-arm-and-cross-over-shaft-A10-A7-B31-B33-42-4350/254730475821?hash=item3b4f1e992d:g:LagAAOSw955fZjez
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The return spring mounts on the RHS on later models, so maybe the difference is length? I have both early and late types but never measured them. As the splines allow the both arms to be placed wherever needed, can't see the high / low bracket being an issue.
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Hi Peter,
I have a spare splined shaft (from a 1960 SR).
Do a deal; if you come to Orabandon 2020, it's yours!
Richard
Thanks Richard for the offer, at this point in time all is looking good for the Orabandon run, just have to see how I pullup after the Jurien Bar run about 1300K
Thanks Morris for the link, they won't post to Australia, however I have one lined up in Australia.
And Thanks RD for the input.
Peter