Bing CV top leak

[sprints@pldi.net]

My 91 r100 has Bing 32 cv carbs. I'm cleaning and servicing them and I found that the welch plug, the shiny round press plug in the very top of the cap leaks. I think it should be leak proof? What do you advise - it isn't replaceable and I think Snowbum mentioned epoxy - any other ideas? Thanks - Rod

[Jean]

Should be LEAKPROOF, and epoxy is the quick and best fix. Wonder how they got loose?
Take the tops off and clean them really good - get rid of any oily or greasy film.
Then apply epoxy around the seal edges. CAREFULLY if you want a neat job.
I've seen a few fixed with silicone glue. NOT pretty!!

[Deleted User 287]

I tried "fixing" a plastic diaphragm retaining ring (no metal ring held down by screws) with some kind of silicone.
I found it did not mix well with gasoline.

After 130 miles:



This is what failed:



I spent the night in a motel half-way to the Gathering of the Clans one year, and was stopped by this in WV or someplace.

There was a Wal*Mart nearby and I was able to find some putty that you cut off a chunk and knead it to mix the two parts, and then apply it to the surface:



It was amazing that the added weight on the left carb did not affect the balance - at least not noticeably. In fact, my ride home the next day was quite pleasant!

http://www.pbase.com/tomfarr/attempted_fix

New plastic rings solved that problem.

[SteveD]

A little epoxy on the top, or even the silicone. It can look messy so maybe bling the carb top.
A small roundel isn't uncommon, a deutchmark would be wunderbar.
I use a Euro.

[Deleted User 287]

Yeah, those are one of my favorite 1-Euro coins. Greece is cool, too.