gas resistant (proof?) adhesive

I am asking a question with this suggestion. I do not know enough about the heat shrink tube to say it could work. But have had a thought of cutting a ring of the correct tube and use it like the ring you had to cut off on the stock setup. Once in the correct location heat it and it may seal it to the slide? 

That's a thought. I've never used it but they do make Viton heat shrink. I wonder if it might work better as an underlayment though, along the lines of the JB weld idea but doesn't need a lathe (that I don't have anyway).

If you try the heat shrink go with the Marine type, it has a glue/sealant in the inside. That may be a good idea.

I'm reading on several other bike forms, e.g. www.kawasakiforums.com/forum/klx-250s-71...ragm-expanded-40085/   and forum.concours.org/index.php?threads/car...cuum-diaphragm.4393/

That hot water shrinks diaphragms. Usually in the context of ones that were exposed to carb cleaner, which enlarges them, which mine have not. 

But does hot water work in other cases too, where it was made too big? And is the shrinkage permanent? I'm a bit wary of overshrinking it so the top end doesn't fit properly under the cap.  I might have my old pair I can test with but it would be nicer to know without potentially destructive tests...

Hot water won't shrink the diaphragm.  In use, on a hot day, the carbs, and diaphragms will get quite toasty, near boiling water temp.  If the diaphragms shrink when hot, they wouldn't fit the carbs after the first hot ride.

Nessism wrote:

Hot water won't shrink the diaphragm.  In use, on a hot day, the carbs, and diaphragms will get quite toasty, near boiling water temp.  If the diaphragms shrink when hot, they wouldn't fit the carbs after the first hot ride.
 

I agree. Sounds fishy.

I always fix leaking fuel tees with heat shink tubes, they never leaked again......