Carb diaphragm replacement

Alrighty folks, here's the sitch. I ordered some carburetor slide diaphragms for my '82 750 Maxim. I have a small tear in one of em and the other ones are surely original. I figure I would just replace all 4 in one go. One of my cinch rings is split and I think I maaay see a crack starting in another one.
It seems to me like the cinch rings are pressed on though and they do not seem serviceable at all...
Is there a way to replace the diaphragms and now that I've noticed the split in the cinch rings, I guess I would ideally be looking to replace that too.

Thanks,
Cole

 

There is a company that is making diaphragms,
I can't remember the name.... maybe BT-sonething or other, but someone here will know. I've seen some of them, I'm not to keen on them yet.

 

There's this place, but I have no idea how good they are: http://jbmindustries.com/HITACHI.html

I've heard of issues with just replacing the diaphram, so I patched with Chacal's RnR Fluid and I'm saving my money for a day I can buy the whole diaphram and piston assembly.

But I just had pinholes. Not sure about small tears.

 

Yup.....that's the one....

 

Have installed a couple of sets and very happy with the results.

They do not have an index bump on the outside, so care must be taken when installing them with orientation of the slide so the air holes in bottom are towards the engine.

 

I've been curious about the longevity of them, compared to originals. Your thoughts, @Toomanybikes ?

 

NRP-Carbs.co.uk does them too....in the Uk, obviously, he sourced them from longer lasting rubber ( ask me how I know) the cinch rings can be removed but it's NOT easy !!

 

You can repair them with a latex condom or glove cut a patch rubber cement or light RTV , when I had my Virago , on the forum seen posters that stated this trick worked great .

 

You can do a lot with those....

 

Thats why i got the saddlebags... Gotta store all those thing somewhere

 

I can sense Matti hovering somewhere close by, any minute now...........

 

oh... are we waiting for an odd comment on rubbers and diaphragms? I know I’ve been fighting the urge all day!

 

What ! A saddle bag full of condoms... you do get around

 

On the subject of the jbm diaphragms, I've had them in my fj1100 and xj650 for over 5 years and they work without fault.

The jbm site offers all the info you need, best money you'll ever spend

 

Thanks a bunch folks.
I'll try the patch-job for now and see how that treats me. If it doesnt work out then its great to know there are alternative!

Cheers

 

Cole where in Canada are you ? I have a few sets of carbs that have been cannibalized for spare bits and I probably have a couple of slides that are good.

 

I'm near High Level, northern Alberta, right now. If these fixes don't end up working for me then replacing the whole slide looks like it'll be the way to go.
What would you be wanting to get for them?

 

Are they all bad? May be easier to set you up with a complete set of good carbs

 

Have a set that has been “done” including jbm diaphragms, throttle shaft seals. Full tear down. Just plug and play for your bike.
82,83 XJ750 Maxim Canadian spec.

 

Have a look at Toomanybikes on Facebook to see what I do for xj owners.

 

They aren't all bad, just one of them has the hole in it, but I was going to replace all 4 just for the helluvit. That was until I realized they werent really serviceable.
I'd like to keep the parts original to the bike if I can (its a bit of a sentimental bike). So I'll see what I can do to make these ones work first. But if not, I would LOVE to finally be able to get some parts from and work with other Canadians. (No offence meant to anyways else!! Its just always nice to work and support local ya know??)

 

Toomanybikes is in Canada.

 

I’m 1 province west of @wcd

 

Yeah, exactly! That's why I would love to take Toomanybikes up on his offer if need be. There are certainly other great people to deal with on this forum, but it would be nice to develop a bit of a network up here!

 

Do you folks know if the diaphragm replacements that @chacal sells are of the same style as the JBM ones mentioned earlier? I hadnt actually opened up the bag and looked at them properly since I got them (I know... shame on me!) but they seem like they might be designed to fit into that slot like the JBMindustries ones do. I don't wanna cut my cinch rings off on the ones I already have to compare, cause then I'd be hooped if they were the wrong ones...

 

Yes they are!

 

Awesome!! Haha you know about the problems I'm gunna run into before I even do! Thanks a ton Len!

 

I had a question I'm new to the forum and wasnt sure where to ask, I have an 83 xj 750 and it runs good idles good but it's only running on 3 cylinders the dead cylinder has spark it has fuel in the bowl but wont run, i know there is a hole in the diaphram from when i was cleaning the carbs would a hole in the diaphram cause a cylinder to get no fuel? If I spray starting fluid in the dead cylinder it fires right up.

 

A small hole in the diaphram can be repaired with of all things a condom cut a piece about a 1/4 inch around hole , apply rubber cement to diaphram and put piece of rubber in place , place another small amount over patch let it set up and should be good to go. This was off the Virago forum it does work .

 

Thanks for the reply I went ahead and bought a new one, the carb is getting fuel to the bowl but the one cylinder wont run? All three other cylinders run good but the one wont, it has spark and runs on starting fluid. Not sure where to go from here the carb has fuel in the bowl but wont run on that one cylinder

 

Compression test
Valve clearance.

 

put patch on inside of diaphr or outside?

 

I patch them on the TOP surface
(Spring side)