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Author Topic: 350F Master Cyl Bushing and Plate?  (Read 463 times)

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Offline sfhurst

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350F Master Cyl Bushing and Plate?
« on: February 14, 2023, 11:33:15 AM »
I am rebuilding three master cylinders that came with three derelict bikes.  None of them had what Honda calls a "Bushing, right" or the "Plate, lever bushing" on the underside of the casting.  What does this bushing and plate do?  More importantly, where can I get them?  No joy with eBay and they are not included in the rebuild kits.
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Offline Jim350Four

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Re: 350F Master Cyl Bushing and Plate?
« Reply #1 on: February 14, 2023, 01:48:32 PM »
Are you talking about the bushing that sits behind the front brake lever?  I read somewhere that its purpose was to eliminate chatter between the front brake lever and the master cylinder when the brake handle was released. When I removed the master cylinder from my 350F, it was also missing. I have access to various sizes of medical tubing, I'm thinking something in the 3/16" range will probably work.  I think I saw it online somewhere 4 into 1 or CNMSL (can't remember). Cost was sub $5
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1974 CB 350F1

Offline newday777

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Re: 350F Master Cyl Bushing and Plate?
« Reply #2 on: February 14, 2023, 02:11:02 PM »
Quote from: sfhurst on February 14, 2023, 11:33:15 AM
I am rebuilding three master cylinders that came with three derelict bikes.  None of them had what Honda calls a "Bushing, right" or the "Plate, lever bushing" on the underside of the casting.  What does this bushing and plate do?  More importantly, where can I get them?  No joy with eBay and they are not included in the rebuild kits.

Post pictures....so there aren't misunderstandings
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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, 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 Nurse Julie

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Re: 350F Master Cyl Bushing and Plate?
« Reply #3 on: February 14, 2023, 02:24:40 PM »
It's a anti rattle bush, held in place by the plate underneath. As suggested above, use a piece of tubing cut to length instead.
« Last Edit: February 14, 2023, 02:28:01 PM by Nurse Julie »
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Trust me I'm a Nurse, I promise it won't hurt....much

Offline sfhurst

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Re: 350F Master Cyl Bushing and Plate?
« Reply #4 on: February 14, 2023, 03:32:33 PM »
Thanks a lot for the input.  I have a lot of automotive rubber tubing in different diameters.  Off to the shop to cut and install. 
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