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Author Topic: Little silver pill tofix the Hyo rear brake cylinder.  (Read 11141 times)

HyoFuelNazi

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Little silver pill tofix the Hyo rear brake cylinder.
« on: September 18, 2011, 09:40:23 AM »

I have had the gunking up rear master cyclinder and replaced it with a newy. Now the new one is finally starting to show the same symptoms.

Ie. it won't full return to the bottom of the piston stroke.

so i took off the top banjo and found with a little force I could push it back down to the bottom of its stroke.

Then I dismantled it and cleaned it and stretched the spring ever so slightly, all seemed good for a few weeks but I suspect the spring has relaxed again and it was beginning to not return. When it gets to a certain height it will no longer scavenge new reservoir fluid.

So I decided to look at the whole cylinder and decided that the poor part is the spring. Its just plain not strong enough. Further thought on the matter had me decide to find a spring that I could fit inside the existing spring.  I sourced one at the local hardware.
Its a CSC C612. ( I tried the C614 but it was a tad too strong so i backed it off to a C612 ). The great thing is that this spring can be fitted merely by removing the top banjo bolt, dropping the spring in then reattaching the banjo and bleeding the banjo.

Voila its great now. Didn't even need to clean it! or pull it off the bike.



« Last Edit: September 22, 2011, 12:24:12 PM by HyoFuelNazi »
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Snowfox

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Re: Little silver pill tofix the Hyo rear brake cylinder.
« Reply #1 on: September 18, 2011, 09:44:16 AM »

We need a forum section just for all rounder mods/fixes that can be applied to all the bikes.
Fixes->(part of bike[Brakes, engine etc])->List of mods/fixes.
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redridinghood

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Re: Little silver pill tofix the Hyo rear brake cylinder.
« Reply #2 on: December 13, 2011, 12:10:29 PM »

if you kind enough to post a picture mate?
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vogstar

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Re: Little silver pill tofix the Hyo rear brake cylinder.
« Reply #3 on: December 14, 2011, 12:18:35 AM »

I've done this too and it works a treat.
Got a photo somewhere round here...
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redridinghood

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Re: Little silver pill tofix the Hyo rear brake cylinder.
« Reply #4 on: December 14, 2011, 05:46:42 AM »

i tried to figure out how to drop the spring as he mentioned, remove the top banjo? the bleeder banjo is it? open up the whole thing?
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HyoFuelNazi

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Re: Little silver pill tofix the Hyo rear brake cylinder.
« Reply #5 on: December 14, 2011, 08:29:53 AM »

Its the banjo that connects the rear brake line to the master cylinder. Undo it and pull it out and you can see into the fluid in the cylinder. Insert the spring straight down into the fluid, then just put the banjo bolt back in on top of it. Was so easy that I never even dreamed of taking a photo, would have taken me 5 minutes as compared to the two minutes it takes  ;D ;D
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redridinghood

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Re: Little silver pill tofix the Hyo rear brake cylinder.
« Reply #6 on: December 16, 2011, 01:43:52 PM »

some photos would be a great help for a noob like me please thanks and cheers :P
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ActionOrlando

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Re: Little silver pill tofix the Hyo rear brake cylinder.
« Reply #7 on: December 28, 2011, 05:41:57 AM »

Is that the same spring in the Brake Caliper rebuild kit from Whygostock??
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newbymick

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Re: Little silver pill tofix the Hyo rear brake cylinder.
« Reply #8 on: December 28, 2011, 11:28:32 AM »

We need a forum section just for all rounder mods/fixes that can be applied to all the bikes.
Fixes->(part of bike[Brakes, engine etc])->List of mods/fixes.

This was suggested many moons ago but it never got off the ground.

Perhaps you would like to step up and create one
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Snowfox

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Re: Little silver pill tofix the Hyo rear brake cylinder.
« Reply #9 on: December 28, 2011, 12:04:49 PM »

Wouldnt that require some form of vBulletin powers?
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