Author Topic: A10 rear brake conversion cable to rod  (Read 6403 times)

Offline Chrisf1

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A10 rear brake conversion cable to rod
« on: 02.06. 2009 17:46 »
Hi again everyone since my bike has been on ebay a few from this forum have asked how I converted my rear brake from cable to rod I will post some pics it is a great improvement but it does require some modification of the actuator on the gearbox side it is also a bit tight around the oil pipes but well worth the time and trouble it actually works and feels like a brake instead of a sponge Chris

Offline tombeau

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Re: A10 rear brake conversion cable to rod
« Reply #1 on: 02.06. 2009 18:28 »
Superb.
Well done!
Cheers,
Iain

Offline dpaddock

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Re: A10 rear brake conversion cable to rod
« Reply #2 on: 03.06. 2009 15:01 »
Nice work, Chris.
We'll miss you on the board.

David
David
'57 Spitfire


Offline NickSR

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Re: A10 rear brake conversion cable to rod
« Reply #3 on: 15.11. 2009 22:38 »
Hi Everyone
Does any one know what brake arm Chris used for his conversion, I am hoping to do the same.

Regards
Nick
1962 Super Rocket
1962 Super Rocket
1955 BSA C11G
1998 BMW R850R

Offline LJ.

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Re: A10 rear brake conversion cable to rod
« Reply #4 on: 16.11. 2009 10:07 »
Looking at the pictures Nick... I'm thinking that he made it completely from scratch.
Ride Safely Lads! LJ.
**********************
1940 BSA M20 500cc Girder/Rigid- (SOLD)
1947 BSA M21 600cc Girder/Rigid-Green
1949 BSA A7   500cc Girder/Plunger Star Twin-(SOLD)
1953 BSA B33  500cc Teles/Plunger-Maroon
1961 BSA A10  650cc Golden Flash-Blue
1961 BSA A10  650cc Golden Flash-Red

Online bsa-bill

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Re: A10 rear brake conversion cable to rod
« Reply #5 on: 16.11. 2009 10:16 »
Now then Chrisf1, a nice mod that I would like to do if I ever get time. *respect*
However I note your first post was in June and I do hope that since then you have had time to tighten up that  bottom rear shocker bolt  *lol*

All the best - Bill ( joking of course )
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline trevinoz

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Re: A10 rear brake conversion cable to rod
« Reply #6 on: 16.11. 2009 20:57 »
This was done early in the production of the A65 which used the same brake. I think they used a two piece rod.
Trev.

Offline alanp

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Re: A10 rear brake conversion cable to rod
« Reply #7 on: 17.11. 2009 20:01 »
This mod is surprisingly common and makes one hell of a difference to the feel of the rear brake. The ones I've seen are welded modifications onto the existing cable arm. The cable design was really dumb but BSA were trying to save every penny they could.
Alan
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Offline NickSR

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Re: A10 rear brake conversion cable to rod
« Reply #8 on: 17.11. 2009 20:52 »
Hi Everone
Thanks for all your replys, I have been in touch with Chris via PM he has been very helpful and given me some pointers.

Brain Pollit BSA OC (Lightning Spares) did this mod some time ago made the rod Z shaped and extended the brake plate torque arm 1'', i think he used the existing brake lever arm (upwards).

Trev: Had a look at a A65 at Newark Autojumble you are correct in saying it is a two piece rod but there is a intermedate bracket welded to frame so that a no go.

Chris's mod goes inside the frame giving a direct pull, hope to do the same will take photos and dimension of the arm that will need to mods to it to bring the connection inside.

Will keep you updated on progress.

Regards
Nick

 
1962 Super Rocket
1955 BSA C11G
1998 BMW R850R

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Re: A10 rear brake conversion cable to rod
« Reply #9 on: 17.11. 2009 21:44 »
does the movement of the S/A cause the rod to pull or push on the brake arm ???

All the best - Bill
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline ronnierockets

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Re: A10 rear brake conversion cable to rod
« Reply #10 on: 18.11. 2009 09:07 »
Hi Nick,
with the help of my friend Tom ,I've done a similar conversion earlier this year,it worked out well, if you need any photos ,or measurements ect, i can email them to you, or put the job lot up on the forum for all to see.
as the wife says,too many bikes, and only one butt.

Offline NickSR

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Re: A10 rear brake conversion cable to rod
« Reply #11 on: 18.11. 2009 22:40 »
Hi Bill & Ronnie

Bill: Not able to answer your question, but I think it will be the same for any rod type oprerated rear brake.

Ronnie: Any photo, dimension  will  be a great help posted on the forum or Email to me its your choice.

What type of brake arm did you use and length ?, what diameter of rod did you use?, how did you construct the S/A end lever? any help will be great.

Photo of your bike look great.

Regards
Nick
1962 Super Rocket
1955 BSA C11G
1998 BMW R850R

Offline ronnierockets

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Re: A10 rear brake conversion cable to rod
« Reply #12 on: 19.11. 2009 14:48 »
Hi Nick ,
I'll have a go at loading the photos,  on the forum,over the weekend.
i'm not too sure if i can load up any more than three at a time,there's eight photos in all, [three  with measurements], any way i'll give it a try... best regards..Ronnierockets..
as the wife says,too many bikes, and only one butt.

Offline NickSR

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Re: A10 rear brake conversion cable to rod
« Reply #13 on: 19.11. 2009 18:29 »
Hi Ronnie
Photos will be great, best of luck loading photo I failed at that task to geat size right, you can Email if you like or happy to send USB stick in the post with return postage paid.

With a bit luck I have purchased an A 65 Brake Arm 68-6042 from the States via Ebay looks like the one to the job.

Regards
Nick
1962 Super Rocket
1955 BSA C11G
1998 BMW R850R

Offline alanp

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Re: A10 rear brake conversion cable to rod
« Reply #14 on: 19.11. 2009 19:15 »
Just to clarify whether converting to rod from cable will affect braking effort due the swing arm movement - My A10/RGS has the original rod operated Goldie type rear brake with the rod on the nearside (left for non UK riders etc!) and I can confirm that the rod end at the front is almost coincident with the centre pivot of the swing arm (which does not carry the cross over cable brake spindle), the rod runs parallel to and in line with the swing arm to the rear with the rear lever keeping the rod end virtually passing through the wheel centre in the side view. Hence, the BSA original design was technically correct in avoiding swing arm movement affecting brake action.
The cable arrangement converted to rod is different in that the brake arm pivot is at the swing arm pivot but the arm then carries the rod higher by the length of the arm connecting the rod, therefore there will be interaction between the swing arm movement and braking effort BUT I've not heard anyone say they've noticed it.  
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