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Brake pipe blocked solid.

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St George
Borekit Bruiser



Joined: 19 Feb 2019
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PostPosted: 18:41 - 28 Feb 2019    Post subject: Brake pipe blocked solid. Reply with quote
I fitted a complete new master cylinder to my Honda 250 as it was leaking. Then tackled the seized piston by replacing it with a stainless steel one with new seals. Went to bleed the system and found the brake line is blocked solid. I have ordered a new braided one from Ebay which was not too painful. Just thought I would share this with everyone as I have never come across this before. Regards to all.
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Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
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PostPosted: 18:45 - 28 Feb 2019    Post subject: Re: Brake pipe blocked solid. Reply with quote
St George wrote:
I fitted a complete new master cylinder to my Honda 250 as it was leaking. Then tackled the seized piston by replacing it with a stainless steel one with new seals. Went to bleed the system and found the brake line is blocked solid. I have ordered a new braided one from Ebay which was not too painful. Just thought I would share this with everyone as I have never come across this before. Regards to all.


I have. It appears that it's possible for the internal rubber of the pipe to fail in such a way as to become a one way vakve.

It happened to my brothers bike on the day I moved out of Bath and he had to get it trailered to London the next day.
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St George
Borekit Bruiser



Joined: 19 Feb 2019
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PostPosted: 18:53 - 28 Feb 2019    Post subject: Reply with quote
Soaked it in very hot water, could not even blow through it.
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Islander
World Chat Champion



Joined: 05 Aug 2012
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PostPosted: 21:10 - 28 Feb 2019    Post subject: Reply with quote
It happened on my R850R. The liner of the rubber brake lines collapsed and blocked the lines completely apparently it's not that uncommon either.
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St George
Borekit Bruiser



Joined: 19 Feb 2019
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PostPosted: 17:17 - 05 Mar 2019    Post subject: Reply with quote
Fitted the new braided pipe, bled the system. Bingo it stops. It is possible that the new master cylinder I bought was not required. Better safe than sorry. The piston and seals, master cylinder with lever and braided hose and pads came to a total just under £80. Not bad for a Jap bike and easy to work on.
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steve the grease
Crazy Courier



Joined: 26 Jan 2018
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PostPosted: 19:44 - 05 Mar 2019    Post subject: Reply with quote
St George wrote:
Fitted the new braided pipe, bled the system. Bingo it stops. It is possible that the new master cylinder I bought was not required. Better safe than sorry. The piston and seals, master cylinder with lever and braided hose and pads came to a total just under £80. Not bad for a Jap bike and easy to work on.



Thats the spirit , and you learned something as well and that is priceless..........
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