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Brake shoes replacement

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iansoady View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb 2020 at 10:25
But do be aware that most modern linings as fitted by general lining establishments are designed to be used with servo car brake systems and require higher pressures than most of us can manage. People like Villiers Services are aware of this and provide different types of lining.
Ian
1952 Norton ES2
1986 Honda XBR500
1958-ish Greeves/Triumph in progress
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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: 12 Feb 2020 at 14:40
It appears that Auto Industrial do that too Ian. When I first acquired the 850GT I discovered something I'd never seen before.It's a 4LS front brake and on each side someone had lined one shoe with green (AM4?)material and the other with the more conventional tan stuff.
Best of both worlds ???

I seem to recall that in Guzziology the original Guzzi brake linings were described as 100,000 mile linings. Probably not a good thing.

Edited by Dave P. - 12 Feb 2020 at 18:33
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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iansoady View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb 2020 at 15:29
AM4 was notorious for grabbing on the first stop of the day, and reportedly didn't work too well till it was hot.

I have read that it was originally developed for milk floats.......
Ian
1952 Norton ES2
1986 Honda XBR500
1958-ish Greeves/Triumph in progress
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Richard Hyatt View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Richard Hyatt Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb 2020 at 18:23
Pop them in a jiffy bag to brake re-line services in Cardiff.
Mega helpful
Did my pads for me really quickly
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Post Options Post Options   Thanks (0) Thanks(0)   Quote trophydave Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb 2020 at 21:19
Originally posted by Richard Hyatt Richard Hyatt wrote:

Pop them in a jiffy bag to brake re-line services in Cardiff.
Mega helpful
Did my pads for me really quickly

Same here, they only took a couple of days or so.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb 2020 at 21:38
AM4, the green one, was a racing lining, though I couldn't say I noticed any difference when I had my Commando 2LS relined with that stuff, still suffered from brake fade.

I took part in the Great Air Race, London to New York. (Anyone old enough to remember that?) No not as a participant, but doing the bit from the PO Tower to Battersea heliport. I can remember going over Battersea Bridge thinking am I going to slow down enough to do that right turn while pulling as hard as I could on that brake lever.
Brian.

Better 5 minutes late in this world than years early in the next.
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Richard Hyatt View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Richard Hyatt Quote  Post ReplyReply Direct Link To This Post Posted: 13 Feb 2020 at 06:05
Whatever you do with the linings , don't forget to centralise the shoes/brake backplane in the rear hub. 
Makes a world of a difference to performance
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 16 Feb 2020 at 10:09
Originally posted by Richard Hyatt Richard Hyatt wrote:

Whatever you do with the linings , don't forget to centralise the shoes/brake backplane in the rear hub. 
Makes a world of a difference to performance


+1 for that. And get the geometry of the levers on the brake plate right. That makes a big difference. Many of the Loops I've seen on the 'net are far from correct. Makes you wonder how they ever stop!
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ranton_rambler Quote  Post ReplyReply Direct Link To This Post Posted: 16 Feb 2020 at 10:53
I have received various advice on how to set the front 4LS brake up so I spent an afternoon last year tweaking the various adjustments and scooting up and down the lane to assess the effect. I reckon it’s about 6/10 now, although I’m perhaps calibrated to disc brakes.
I’ve also had 3 different linings during my ownership of the bike, all with very different characteristics. The current set came from the place in Cardiff recommended by V7 John. Miles better than the previous.
Ian 
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Richard Hyatt View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Richard Hyatt Quote  Post ReplyReply Direct Link To This Post Posted: 16 Feb 2020 at 12:35
I've always slackened off all the linkages
The operated the front brake lever and brought that cam to push it's end of its shoe to the drum
Then I have put a spanner onto the nut on the 2nd cam and manually brought that cam to operate it's end of its shoe up to the drum 
Then holding it there , taken up the operating links  to keep everything snug
Then I pretty much know that both cams bring their respective ends of their shoes up to the drum simultaneously. 
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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: 16 Feb 2020 at 14:53
http://www.thisoldtractor.com/moto_guzzi_loopframe_brake_adjustment.html

I think I've posted this before but it's nonetheless interesting a second time. It illustrates among other things the correct angle between lever and cable on the brake plate. This is important and is often wrong on Loops seen on the net. It is sometimes necessary to move the levers around on their splines to achieve the correct angle and lack of free length in the cable can cause problems. The cable may need to be altered; JJ Cables of Lighthorne Warwickshire can oblige.
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 16 Feb 2020 at 21:36
Ideally there should be 90 degrees between the lever and cable with the brake firmly on. That gives maximum purchase.
Brian.

Better 5 minutes late in this world than years early in the next.
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