Author Topic: Grease for master cylinder rebuild?  (Read 428 times)

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Offline Scott S

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Grease for master cylinder rebuild?
« on: August 22, 2022, 04:47:17 PM »
 I'm about to attempt a rebuild of the master cylinder from my CB500. A few of the videos I watched mention using a little grease.
 Is this stuff OK to use?
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline Chuck Hahn

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Re: Grease for master cylinder rebuild?
« Reply #1 on: August 22, 2022, 04:53:55 PM »
I just wipe a little brake fluid on the cups and seals in the calipers when reassembling them.

Online bryanj

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Re: Grease for master cylinder rebuild?
« Reply #2 on: August 22, 2022, 05:21:47 PM »
That grease no, its for pads and sliding pins on cars, red rubber grease if anything
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 Dunk

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Re: Grease for master cylinder rebuild?
« Reply #3 on: August 22, 2022, 05:23:31 PM »
No, that is for between moving parts. I use that stuff on the back of the brake pads between the caliper. It's thick and tacky. Stop brake squeal for a little bit.

When rebuilding hydraulics I use a very light coat of the little tub or tube or pink grease included in many kits, or just wet a finger in brake fluid and wipe it on the sealing surfaces.

Offline Scott S

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Re: Grease for master cylinder rebuild?
« Reply #4 on: August 22, 2022, 05:24:04 PM »
 Thanks, guys!
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline MauiK3

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Re: Grease for master cylinder rebuild?
« Reply #5 on: August 22, 2022, 07:20:03 PM »
My rebuilds kit came with a tiny tiny plastic jar of red grease
1973 CB 750 K3
10/72 build Z1 Kawasaki