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Author Topic: Front brake bleeder screw  (Read 1257 times)

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Offline JDrider

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Front brake bleeder screw
« on: May 12, 2023, 04:10:35 PM »
I am currently rebuilding the front brake.
I ordered parts from 4into1 for brake lines and
Caliper parts. Included was a new bleeder valve screw.
I rounded off the old bleeder screw of course.
This one is not the right thread pitch.
Does anyone know if this caliper is original and
Where to get a correct screw. Thank you.
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JD
1975 CB550K1

Offline Don R

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Re: Front brake bleeder screw
« Reply #1 on: May 12, 2023, 04:12:50 PM »
 It appears he has a 550.
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Offline JDrider

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Re: Front brake bleeder screw
« Reply #2 on: May 12, 2023, 04:16:20 PM »
Correct.
1975 cb550k1

Like my signature says.
« Last Edit: May 12, 2023, 04:52:22 PM by JDrider »
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JD
1975 CB550K1

Offline JDrider

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Re: Front brake bleeder screw
« Reply #3 on: May 12, 2023, 05:43:26 PM »
It looks like this caliper body is an aftermarket.
Doesn’t look like ones on eBay.
This will make it trickier to find parts. I wonder if I should find an original used one?
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JD
1975 CB550K1

Offline JDrider

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Re: Front brake bleeder screw
« Reply #4 on: May 12, 2023, 05:49:31 PM »
Quote from: calj737 on May 12, 2023, 05:46:38 PM
You can head to the local auto parts store and find a bleeder screw to match the original. Easy enough. Looks like an 8mm 1.25 pitch.

I will try that. Thank you.
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JD
1975 CB550K1

Offline bryanj

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Re: Front brake bleeder screw
« Reply #5 on: May 13, 2023, 12:01:30 AM »
Or look up m matti on amazon as they do complete calipers with or without swinging bracket
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Offline jlh3rd

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Re: Front brake bleeder screw
« Reply #6 on: May 13, 2023, 04:12:29 AM »
Quote from: JDrider on May 12, 2023, 05:43:26 PM
It looks like this caliper body is an aftermarket.
Doesn’t look like ones on eBay.
This will make it trickier to find parts. I wonder if I should find an original used one?

oem caliper will say " tokia" in raised letters on the bottom edge..
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Offline Rookster

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Re: Front brake bleeder screw
« Reply #7 on: May 13, 2023, 07:42:18 AM »
The bleeder size should be 10mm 1.25.  The oem Honda ones will rust over time in any type of wet environment.  I used stainless steel speedbleeders in my dual disk calipers.  The oem rubber cap fits right on as well.  The speedbleeder part number is SB10125-SS.

Scott
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Offline newday777

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Re: Front brake bleeder screw
« Reply #8 on: May 13, 2023, 09:16:50 AM »
Quote from: Rookster on May 13, 2023, 07:42:18 AM
The bleeder size should be 10mm 1.25.  The oem Honda ones will rust over time in any type of wet environment.  I used stainless steel speedbleeders in my dual disk calipers.  The oem rubber cap fits right on as well.  The speedbleeder part number is SB10125-SS.

Scott

As long as he has a stock caliper.....but
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 1 K2, 4 K6, 1 K8, 1 F1, 1 F3
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline JDrider

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Re: Front brake bleeder screw
« Reply #9 on: May 13, 2023, 12:13:46 PM »
I measured the bleeder valve I needed.
M8x1.25mm x 30.1.
They didn’t have any at the auto parts store nearby so I ordered from
Amazon.
Thanks for everyone’s help!
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JD
1975 CB550K1

Offline bryanj

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Re: Front brake bleeder screw
« Reply #10 on: May 13, 2023, 12:27:02 PM »
M10 is earlier 750, 50/550 is M7
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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).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline Gordon

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Re: Front brake bleeder screw
« Reply #11 on: May 13, 2023, 12:48:52 PM »
Quote from: JDrider on May 12, 2023, 04:16:20 PM
Correct.
1975 cb550k1

Like my signature says.

Just a heads up, a lot of people (myself included) have the signature feature turned off because they can be really annoying. 
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Offline JDrider

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Re: Front brake bleeder screw
« Reply #12 on: May 13, 2023, 01:16:32 PM »
I wasn’t aware that could be turned off.
Thanks for the info

Quote from: Gordon on May 13, 2023, 12:48:52 PM
Quote from: JDrider on May 12, 2023, 04:16:20 PM
Correct.
1975 cb550k1

Like my signature says.

Just a heads up, a lot of people (myself included) have the signature feature turned off because they can be really annoying.
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JD
1975 CB550K1
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