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frustrated...struggling to get the diaphram to fit

  • Thread starter Thread starter samp615
  • Start date Start date
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samp615

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After cleaning the carbs I am not putting them back together. Everything is going fine except for one diaphragm. For some reason I cannot the ring around the diaphragm to fit into the casing! It just seems too big and is getting very frustrating!!!

Note- I did spray some gunk carb cleaner (aerosol not dip) in the carbs without removing. It may have been a newbie mistake and swelled the rubber, but the can says nothing about removing rubber parts, plus all the other diaphragms seemed just fine.


Any advice would be GREAT!
 
Rubber cement applied sparingly around the groove the diaphragm sits in works a treat.
 
I'll give that a shot. I was hesitant to use any adhesive simply because it is a rubber part. But rubber cement won't hurt it, right? Thanks, i'll look into it
 
samp615 said:
After cleaning the carbs I am not putting them back together. Everything is going fine except for one diaphragm. For some reason I cannot the ring around the diaphragm to fit into the casing! It just seems too big and is getting very frustrating!!!

Note- I did spray some gunk carb cleaner (aerosol not dip) in the carbs without removing. It may have been a newbie mistake and swelled the rubber, but the can says nothing about removing rubber parts, plus all the other diaphragms seemed just fine.


Any advice would be GREAT!
Click to expand...
If you are not already doing so, inverting the diaphragm so it looks like a mushroom cap will help it sit better in the groove.
 
Is the tab lined up ? And are you pushing up the slide with your finger, as per Nessism's guide, page 58 ?
 
Referencing the two posts above, that is the way to do it.

I push the diaphragm down, so the edge sits in the groove, while holding the slide up with my finger in the intake side of the carb. Make sure the point of the needle is in the needle jet. Hold the slide/diaphragm in that position, place the spring on top of it, put the cap on top of the spring. compress it all into place, but keep holding the slide up. Get at least two of the screws in place and moderately snug before letting the slide down.

It takes longer to write or read the procedure than it does to do it. It works well, and has worked every time for me. :D

.
 
Thanks for the help all.

Three of the carbs were so easy, just this one that is so odd. I got it in there, but it unfortunately may have been more forceful than graceful.

Can someone explain to me what the purpose of this little boot is and does it have to be 100 percent sealed?
 
samp615 said:
Thanks for the help all.

Three of the carbs were so easy, just this one that is so odd. I got it in there, but it unfortunately may have been more forceful than graceful.

Can someone explain to me what the purpose of this little boot is and does it have to be 100 percent sealed?
Click to expand...

Yes it needs to be sealed, no you don't want it pinched, and you did check them with a back-light source for pin holes or tears right? The diaphragm is what seals to create vacuum to lift the slide.

Ed and steves method are spot on, and all things being equal generally you shouldn't have much trouble getting it to stay in it's groove. However I have found later model carbs, and some poorly kept GS carbs to have some shrinkage of the rubber diaphragm causing it to not want to stay put long enough to trap it with the cap. Hence the rubber cement. No it won't do any damage. The rubber bit is exposes to gas vapor, and rubber cement, while smelly, is not nearly as caustic.
 
chef1366 said:
Rubber cement :eek:
I use vaseline.
Click to expand...
I use vaseline to store em... Rubber cement to hold em in place.. just a touch people. Im not covering the damn thing with it. A tip a got from a ZRX guy cause those NEVER stay where they're supposed to...
 
TheCafeKid said:
..., and you did check them with a back-light source for pin holes or tears right? ...
Click to expand...
Here is what you are hoping you don't find:

IMG_3028.jpg


This was actually out of a Yamaha, but the principle is the same.
shrug2.gif


.
 
I have used a thin strip of Ultra Black Permatex in the groove to hold a stubborn one in place.

Daniel
 
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