Rear master cylinder proportional valve leaking

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There have been threads on this before but I don't remember any solutions being offered except taking a chance on a used one.

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I had that same problem this past spring and not being able to purchase a replacement valve I was able to repair the old one. Check back on this forum to a discussion I started on May19. ...Titled 83 Gl1100 rear brake pressure control valve. If you cant find it let me know and I will re write the repair procedure that I used....GM

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K&L sells a repair kit.

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Hi George83wing..........Cyclewizard says K&L sells a repair kit which is great to know. I wish I had known that in the spring.......I was able to repair the unit I was working on with a sealing compound called HONDABOND. Prior to re-assembling the valve I wiped the rubber cup and o ring with o ring lubricant which is designed to slightly swell the rubber. After assembly I waited a full 24 hrs before refilling , bleeding and testing.It worked well and has been holding since late May. Hondabond you can purchase at the Honda Dealer and the lubricant is just called o ring lube which you can purchase at an auto parts outlet or an hydraulic shop.......GM

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Thanks..... I will try as suggested. Love my 83 wing and good brakes are necessary