flak monkey
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| posted on 24/4/10 at 07:37 PM |
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Modifying sierra handbrake mechanism
I will need to modify the handbrake mechanism on my sierra calipers, or find an alternative fitment, to fit them under the 13" CXR's I am
going to fit.
I have to keep everything withing 154mm of the axle centreline
I make the handbrake lever and spring 158-160mm from the centreline so I need to squeeze 4-6mm off somewhere 
Pics would be good
Sera
http://www.motosera.com
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bigrich
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| posted on 24/4/10 at 09:34 PM |
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David, remove the stock spring and replace with a compression spring over the cable between the lever arm and cable retainer of the caliper. you can
also gain a little more clearence by bending the lever arm of the caliper down slightly.
.JPG)
A pint for the gent and a white wine/fruit based drink for the lady. Those are the rules
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hobbsy
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| posted on 24/4/10 at 09:56 PM |
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I also need to do this. Where did you source the new spring? Got any photos? Thanks.
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bbwales
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| posted on 24/4/10 at 10:16 PM |
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I have just done this and got my springs from a drum brake sierra, I used the hand brake springs where the cable enters the drum, had to cut them but
no probs and it seems to work fine.
Regards
Bob
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James
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| posted on 24/4/10 at 10:57 PM |
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Seconded with photo request. Having trouble picturing what you mean Bob!
Cheers,
James
------------------------------------------------------------------------------------------------------------
"The fight is won or lost far away from witnesses, behind the lines, in the gym and out there on the road, long before I dance under those lights."
- Muhammad Ali
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bbwales
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| posted on 24/4/10 at 11:05 PM |
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I will take some pics tomorrow and try and post them, but be warned I do have a problem with that.
Regards
Bob
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JonnyS
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| posted on 27/4/10 at 06:55 AM |
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RJK350 has just had a batch of shortened springs made with only 3 coils, I had a pair. He may have some left.
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bbwales
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| posted on 27/4/10 at 08:11 AM |
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Hi I have put a couple of pics on in my area, will try to upload them here but please don't hold your breath.
Bob
MY god I did it, the springs are from a Sierra drum brake cable.
[Edited on 27/4/10 by bbwales]
 
Rescued attachment Brake spring1.JPG
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hobbsy
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| posted on 27/4/10 at 01:08 PM |
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Let me just turn my photo around so its the right way (original post above deleted):
 
Rescued attachment rear.jpg
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JonnyS
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| posted on 27/4/10 at 05:36 PM |
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So you need a 3 coil spring (or spring on cable) and to bend the arm down slightly. Yours looks exactly like mine did.
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hobbsy
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| posted on 28/4/10 at 05:22 PM |
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I'm getting a pair of 3 coil springs from RJK350.
I'll post up an "after" photo when I get them fitted.
May have to just touch the outer part of the spring mech with the angry grinder (or a file).
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JonnyS
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| posted on 28/4/10 at 06:36 PM |
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quote:
Originally posted by hobbsy
May have to just touch the outer part of the spring mech with the angry grinder (or a file).
Bending it is easy, just put a screwdriver in the hole on the arm and pull down gently.
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hobbsy
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| posted on 28/4/10 at 07:39 PM |
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Oops I'd forgotten you'd said that.
I'll do that then!
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