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Improving Front Wheel Brakeing on a Brit #341762
11/06/10 10:38 pm
11/06/10 10:38 pm
Joined: Sep 2010
Posts: 383
South London UK
S
Sgt:Woodie Offline OP
BritBike Forum member
Sgt:Woodie  Offline OP
BritBike Forum member
S
Joined: Sep 2010
Posts: 383
South London UK
Single leading shoe brakes on some Brit Machines leave much to be desired. I have tried for over 50 years to improve my front brake on my BSA C12, I therefore had to smile at this I found on a site dedicated to the problem. I quote
from adealers mechanic. One of the local bikes is an Ariel Leader. The owner has fitted electric starting and a twin leading shoe front brake with much trial and error on the way.
1 longer operating arm This made the brake better but not much
2 floating brake shoes {the locating curve on the brake anchor is removed to allow the shoes to centralise ) , again a slight improvement
3 Two brake cams expanding the brakes at both ends, not recommended, no better than standard
4 Two cams with the trailing lobes removed , this used floating shoes , worked well but was slow releasing
5 Twin cams as above but with the locating curve retained though reduced to locate on the removed section of the brake cams. This was my suggestion and I have not seen him since, I blame the weather. Woodie

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Re: Improving Front Wheel Brakeing on a Brit [Re: Sgt:Woodie] #341780
11/07/10 12:00 am
11/07/10 12:00 am
Joined: Jun 2007
Posts: 5,848
Maui Hawaii
HawaiianTiger Offline

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HawaiianTiger  Offline

BritBike Forum member
Joined: Jun 2007
Posts: 5,848
Maui Hawaii
I wouln't try two cams on a single leading shoe braking. The consequences could be drastic. There is too much flex in those backing plates leading to a bit of servo action. Not good. I did try carbon fiber shoes once and it was basically a revelation. Slow to warm up, but once warmed up was just as good as a well set-up TLS brake. Vintage car racers use this stuff.
Bill


Bikes
1974 Commando
1985 Honda Nighthawk 650
1957 Thunderbird/T110 "Flying Tiger"
Antique Fans: Loads of Emersons (Two six wingers) plus gyros and orbiters.
Re: Improving Front Wheel Brakeing on a Brit [Re: Sgt:Woodie] #341807
11/07/10 3:08 am
11/07/10 3:08 am
Joined: Aug 2001
Posts: 1,719
BC Canada
441/R3cafeSteve Offline
BritBike Forum member
441/R3cafeSteve  Offline
BritBike Forum member
Joined: Aug 2001
Posts: 1,719
BC Canada
I prefer the clunky 8" TLS over conical still for looks and ease of adjustment. They look better made as well the conical always looked sort of plastic to me.
S

Last edited by 441cafeSteve; 11/07/10 9:13 am. Reason: Brake service rant deleted

The 441, most versatile BSA of the 60's
Re: Improving Front Wheel Brakeing on a Brit [Re: ] #341823
11/07/10 5:26 am
11/07/10 5:26 am
Joined: Aug 2001
Posts: 7,420
scotland
triton thrasher Online content
BritBike Forum member
triton thrasher  Online Content
BritBike Forum member
Joined: Aug 2001
Posts: 7,420
scotland
Originally Posted By: BenG
He made the brake so that the brake cam was free to move fore and aft in a slightly oval hole in the backing plate.


Is there any sort of spring mechanism to return the cam to the centre of the oval hole when you release the brake?


Amateur Loctite enthusiast.
Re: Improving Front Wheel Brakeing on a Brit [Re: 441/R3cafeSteve] #341848
11/07/10 10:40 am
11/07/10 10:40 am
Joined: Nov 2009
Posts: 2,161
Netherlands
Peter R Offline

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Peter R  Offline

BritBike Forum member
Joined: Nov 2009
Posts: 2,161
Netherlands
Originally Posted By: 441cafeSteve
the conical always looked sort of plastic to me.

IMHO,the conical brake is a good stopper, these brakes can be improved by fitting longer brake lever arms. Even on a relatively heavy bike like my Trident, this brake works fine.


Peter.
1974 Commando 850
1972 Trident T150T
1961 Goldie DBD34
1969 Benelli 250 sport special
Re: Improving Front Wheel Brakeing on a Brit [Re: Sgt:Woodie] #341863
11/07/10 1:02 pm
11/07/10 1:02 pm
Joined: Aug 2005
Posts: 2,129
Kent
KarlB Offline
BritBike Forum member
KarlB  Offline
BritBike Forum member
Joined: Aug 2005
Posts: 2,129
Kent
Or just swap it for a Honda CB175 TLS brake, that works... smile


Last edited by KarlB; 11/07/10 1:29 pm.

KarlB
Big day has come and gone and still no idea what Project 50 will be!
Re: Improving Front Wheel Brakeing on a Brit [Re: Sgt:Woodie] #341868
11/07/10 1:22 pm
11/07/10 1:22 pm
Joined: Aug 2005
Posts: 2,129
Kent
KarlB Offline
BritBike Forum member
KarlB  Offline
BritBike Forum member
Joined: Aug 2005
Posts: 2,129
Kent
Or you could find one of these rather good double sided SLS brakes that came on Ducatis etc...



KarlB
Big day has come and gone and still no idea what Project 50 will be!

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