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Enfield Bullet 500

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Chris950s View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Chris950s Quote  Post ReplyReply Direct Link To This Post Posted: 17 Oct 2019 at 11:27
On my Triumph T100SS I have added a twin leader front drum brake, at one time I had new pads with green friction material that was apparently for racing use. The brake was very snatchy when cold but fantastic after it had warmed up.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 17 Oct 2019 at 12:16
Those would have been the AM4 racing linings.
Sadly on the Commando it transpired that the hub casting was poor, which left an air gap between the cast iron drum and the hub, hence the severe brake fade.

But in normal circumstances a change of lining material would make a considerable difference.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Ben. Quote  Post ReplyReply Direct Link To This Post Posted: 17 Oct 2019 at 14:50
Green linings! That takes me back.
I was lucky with the BSA I rescued, it was a '57 and therefore fitted with Ariel full width hubs which braked very well on AM4's. I do think the 1 inch solid front wheel spindle gave the forks extra rigidity as well, and wonder if we've lost the plot a bit there.
I realise that the bearing inners effectively become part of the spindle, but that doesn't stop twisting like having clamps around a length of solid inch bar.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote nab301 Quote  Post ReplyReply Direct Link To This Post Posted: 17 Oct 2019 at 23:28
The TLS  Enfield has a clamped axle design with a domed centre nut retaining the brake plate , it is recommended  to only lightly tighten and threadlock  this nut  with the brakes on to centre  everything  ,and then to shim the nut if necessary  against the fork leg  to prevent it loosening.  Overtightening it distorts the backplate.
The fork set up / casquette  design is poor  and flexes even with poor standard brakes , requiring a brace or strong mudguard if the brakes are improved.


@jog 53  , I've emailed that document  on brake set  up. 



Edited by nab301 - 17 Oct 2019 at 23:31
Nigel
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 18 Oct 2019 at 15:22
One simple but effective mod' I've made to all drum braked bikes I've owned,after setting them up.I have the usually skinny brake cable copied in heavy duty materials.It can make a significant difference.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 18 Oct 2019 at 17:04
Some of the original Redditch built Bullets had a double sided 6" SLS brake. It had the shoe pivot plate held by 2 bolts on the backplate which had a designed in clearance so that you could centralise the shoes properly rather than having excess clearance on the wheel spindle which has always struck me as on the crude side.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Graham Quote  Post ReplyReply Direct Link To This Post Posted: 18 Oct 2019 at 17:05
They don't have the skinny wire they have a rod. There is a mod to drill the the nut out can't remember it was the top or bottom one. So you can add a nut on  the rod so you can adjust each shoe independent of each other . As as it is now you adjust the shoes by turning the rod which pushes both shoes out together but not good   
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 18 Oct 2019 at 19:49
To set up a 2LS brake you do need to be able to adjust each lever independently.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 2019 at 15:42
The skinny cable I referred to is the cable from the handlebar lever to the lever and rod arrangement on the brake plate.
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

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Dave P. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 2019 at 15:52
google find the nearest gas station

If you really want to go for it you can convert your drum brake to hydraulic operation. A friend has done this on his Ariel KH 500 twin and is very pleased with the result.

Edited by Dave P. - 20 Oct 2019 at 15:55
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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