« previous next »
Pages: [1]   Go Down

Author Topic: Can my master cylinder be saved?  (Read 448 times)

0 Members and 1 Guest are viewing this topic.

Offline slyguy

  • Enthusiast
  • **
  • Posts: 171
Can my master cylinder be saved?
« on: September 16, 2025, 07:10:06 PM »
As my friend Forest Gump would say, stupid is what stupid does isn’t it? I made great progress today reassembling & emptying a bin & a couple more boxes! I was ending doing new levers from yamiya & the m/c side was very tight & not returning properly so I tried tweaking the slot a tad, felt a bit better so I went again & F#*k! Is it possible to heli arc or weld to repair or is it trashed? And….is so, anybody got one?
Logged

Offline CycleRanger

  • No comment about being an
  • Really Old Timer ...
  • *******
  • Posts: 5,780
  • Central Texas Shop Manual Advocate
Re: Can my master cylinder be saved?
« Reply #1 on: September 16, 2025, 08:39:11 PM »
That one is pretty much done.  :(

Fortunately aftermarket replacements are available and not terribly expensive.
Logged
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline pjlogue

  • Expert
  • ****
  • Posts: 1,038
Re: Can my master cylinder be saved?
« Reply #2 on: September 17, 2025, 04:44:31 AM »
I think CycleRanger is correct.  The cost to repair properly and safely far exceeds the cost to replace.  either get a new aftermarket one or used one off Ebay and rebuild that.  Rebuilding a MC is not hard.  Just be sure the used MC has a clean bore and is not pitted. 

-P.
Logged

Offline newday777

  • Really Old Timer ...
  • *******
  • Posts: 6,815
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: Can my master cylinder be saved?
« Reply #3 on: September 17, 2025, 07:35:22 AM »
Replacement time. That is trash bin fodder
Logged
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, 2 K4, 2 K6, 1 K8
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 MauiK3

  • A K3 is saved
  • Old Timer
  • ******
  • Posts: 4,948
  • Old guy
Re: Can my master cylinder be saved?
« Reply #4 on: September 17, 2025, 07:45:20 AM »
not returning smoothly is likely caused by the center pivot bolt
Get a new one
Logged
1973 CB 750 K3
10/72 build Z1 Kawasaki
Pages: [1]   Go Up
« previous next »