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D1 Brake upgrade.
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BillShas
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June 5, 2021 - 8:42 am
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The eBay bitsa is now running but the old front wheel has a flat, so I’ve decided to tryout the front from the D3 competition replica I’m building.

first job fit brake shoes. 

Quite a large change in size, I hope it doesn’t throw me over the handlebars.154CEC85-070D-42BB-BC01-57B52A1BBB84.jpeg

 

 

D1D29E49-5D97-4D98-B5DF-54A0B25BCCB8.jpegB5CB2E78-8404-4422-AFD9-38CC6DCDA547.jpeg

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mike p5xbx
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June 5, 2021 - 5:18 pm
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you’re very lucky to have the brake shoes i’ve had a D1 Comp hub for about 15 years and never found any shoes for it as yet.

D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

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BillShas
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June 5, 2021 - 9:11 pm
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Mike

I bought a couple of C11 rear brake plates from eBay which had the shoes, springs and cams, they were cheap. 

it’s the hubs which seem to be difficult to find.

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BillShas
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August 22, 2021 - 9:12 am
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So quick update, 

D1 is now mechanically complete and running, 12v conversation complete and wired. Tank needs finishing / decals

Both wheels have now got good condition std D1 / D3 hubs fitted, very little wear on the hub brake drum and the drum surfaces were honed ‘ scuffed up with sand paper before fitting to frame, brake shoes are NOS green materiel on front, ferodo modern replacements with a small amount of wear on rear, the diameters are the same. Both brake cams have minimal wear in the brake plates, this is critical to stop the whole brake plate moving when the pedal / lever is applied.

brakes are now excellent at slow speeds on the drive,

Competition / C10L brake hub is back on the pile waiting for the D3 to make it to the top of the list. Have to admit the brake was good but without the correct front cable fitted to the bike, there wasn’t enough adjustment at the handlebars without the lever coming too far back, Competition / c10L has longer brake cam lever arm at the hub

 

84289A74-287D-4094-9FEB-16FC1589B12F.jpeg160622B3-E006-4448-BF55-84CDF7980647.jpeg8C515F38-F76B-4DE2-8D5E-6EC4F160E643.jpegC214DC6D-1B91-4B6E-B0BA-8181F8E75976.jpeg

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paulkentuk
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October 15, 2021 - 1:09 pm
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Hi,

Just an FYI  but I've discovered there is an upgrade path to sintered metal brake linings for the D1.

Our Area Rep has had them fitted to several different bikes recently, and reports an improvement. He used Villiers Services, so I'm in the process of placing an order if for no reason other than, they have to be better than the standard linings !

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GlenAnderson
Dover
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October 15, 2021 - 1:25 pm
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Just be aware that modern sintered linings are much harder on the brake drums than the original type. Once the drum itself is worn then the whole hub is scrap, or in need of an engineered solution to repair. 

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Unitminor
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October 15, 2021 - 4:33 pm
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If you have green lining it may pay you to keep  an eye on them . I had a Ford Anglia in the 60 s which had green linings they were a nightmare as after a not to many miles they seem to go glass hard and lose there braking ability. 

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