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Author Topic: Front brake bleeder valve question - 500  (Read 1156 times)

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Offline Chachi

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Front brake bleeder valve question - 500
« on: July 10, 2013, 05:12:49 PM »
I have a slight leak at the threads where the bleeder valve screws in. I added SS brake lines and bled system a few months ago. I just noticed the leak; I think it just started. Anyway, the bleeder valve is quite stripped so - I can't really tighten it up any more and I don't wan't to b/c it's so stripped. I have a new bleeder valve on order. To replace... I need to bleed the system, unscrew the old valve completely and then replace with new valve? And then refill/bleed system for use?
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73 CB750 K3
72 CB500 K1 - Sold
75 MR50 Elsinore K1

Offline dohcdelsol93

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Re: Front brake bleeder valve question - 500
« Reply #1 on: July 10, 2013, 05:20:58 PM »
The bleeder valve is a harder material than the caliper.  Don't be shocked if.that doesn't fix your problem.  you could maybe tap and helicoiled  the caliper but if it doesn't work I'd look into a good used caliper rather that helicoil.
« Last Edit: July 10, 2013, 06:13:17 PM by dohcdelsol93 »
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Offline LesterPiglet

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Re: Front brake bleeder valve question - 500
« Reply #2 on: July 10, 2013, 05:24:55 PM »
Yep, I would guess it's the caliper threads stripped.
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Offline Chachi

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Re: Front brake bleeder valve question - 500
« Reply #3 on: July 10, 2013, 07:48:04 PM »
OK, thanks.
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73 CB750 K3
72 CB500 K1 - Sold
75 MR50 Elsinore K1

Offline bryanj

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Re: Front brake bleeder valve question - 500
« Reply #4 on: July 11, 2013, 12:29:52 AM »
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

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Offline Chachi

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Re: Front brake bleeder valve question - 500
« Reply #5 on: July 11, 2013, 07:56:20 AM »
There is some fluid on the underside of the dust cap/top of the valve as well. I guess I don't 100% know if the leak is originating from the top (valve not tightened all the way) or the bottom threads (stripped threads), right? Since I have the bleeder valve coming I am going to start with that. Note that the leak is what I would consider very minor - just enough fluid to show up, not running down the caliper, etc.

If I replace the bleeder valve and still have the symptom... I don't have the tools or skills to drill out... wasn't there someone on here that offered a bleeder valve replacement service for stuck or broken valves?
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73 CB750 K3
72 CB500 K1 - Sold
75 MR50 Elsinore K1

Offline LesterPiglet

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Re: Front brake bleeder valve question - 500
« Reply #6 on: July 11, 2013, 08:37:55 AM »
It's not just a leak. It is a loss of braking pressure. It may/could result in a total loss of front brake. Yes I did see someone offering that service. I think bryanj had some thingies to fix that, maybe I'm wrong.
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'Then' and 'than' are completely different words and have completely different meanings. Same with 'of' and 'have'. Set and sit. There, their and they're. Draw and drawer. Could care less/couldn't care less. Bought/brought FFS.


Les Ross.            Certified by a Professional

Offline Chachi

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Re: Front brake bleeder valve question - 500
« Reply #7 on: July 11, 2013, 08:46:55 AM »
OK, thanks. My lever does feel (very slightly) softer. I also noticed that there was a slight front wheel drag (again, very slightly) when rolling the bike that was not previously there. All of this is related I assume. I'm still back to trying a new bleeder valve and then some type of caliper work if that doesn't resolve. Best to not ride at all until resolved?
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73 CB750 K3
72 CB500 K1 - Sold
75 MR50 Elsinore K1

Offline Chachi

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Re: Front brake bleeder valve question - 500
« Reply #8 on: July 11, 2013, 10:45:08 AM »
I found the info on the member offering the bleeder valve repair service (in the Services section). I'll keep that handy if I need to go that route.
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73 CB750 K3
72 CB500 K1 - Sold
75 MR50 Elsinore K1
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