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1981 GPz550 rear master assembly. EBAY? WHERE? 30 Apr 2023 14:43 #884015

  • chopper1963
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Hello all. Pushing ahead on my GPz550 restoration. I can maybe see the end of the tunnel on a good day.

I'd like to replace the entire rear master cylinder assembly. Master, cup, hose. Is there a good eBay replacement? I'd also like to run a steel line from the caliper to the master.

Sorry if I asked this before. I had a bad case of COVID and my memory very slow to return. I'm SHOCKED that I remembered my PW here.

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1981 GPz550 rear master assembly. EBAY? WHERE? 30 Apr 2023 15:01 #884017

  • Scirocco
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A pic of your GPz550 rear master cylinder assembly would be helpful.

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1981 GPz550 rear master assembly. EBAY? WHERE? 30 Apr 2023 18:16 #884023

  • Nerdy
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chopper1963 - no worries; here is the thread from 2018 where you asked about it :) kzrider.com/forum/5-chassis/608177-repla...aster-on-1981-gpz550

It includes guidance from loudhvx (RIP) and Scirocco for using MCs from other bikes.

I set up a search on ebay and kept after it until I found a good used MC and an NOS internal piston. This genuinely took 3-4 years of absolutely no results, then those two items popped up within a few weeks of each other. Can't predict how that's going to go. :)

In the interest of time, you could adapt a part now and continue to search for the correct one. Either way, finding a stainless brake line to fit shouldn't be a problem at all. You can also make one yourself or have a brake shop make it for you with the fittings you want.
1979 KZ400 Gifted to a couple of nephews
1967 Yamaha YCS1 Bonanza
1980 KZ440B
1981 Yamaha XT250H
1981 KZ440 LTD project bike
1981 GPz550
2013 Yamaha FZ6R

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1981 GPz550 rear master assembly. EBAY? WHERE? 30 Apr 2023 19:06 #884026

  • Scirocco
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Any NISSEN 1/2 MC do the same job!

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