New CV Carb Diaphram source 19$ each

[Guest]

I just came across this on CL.
Just passing this info on, not sure if this is a proper match for our CV's or not.

http://akroncanton.craigslist.org/mpd/4507123292.html

And website: seems pretty well thought out.

http://jbmindustries.com/Yamaha650.html

This is about a half hour from me if anybody needs anything, PM.

[850GT_Rider]

You know, in all the carb rebuild instructions and threads that I've seen here, I've never seen THIS instruction, found on the JBM website.

Is it really that critical? If so, why?

[Steve]

You know, in all the carb rebuild instructions and threads that I've seen here, I've never seen THIS instruction, found on the JBM website.

Is it really that critical? If so, why?

You have never seen that instruction because it is hidden within another instruction. The one that says "make sure the tab on the diaphragm lines up with the recess that holds it" or something like that. With the tab in its proper place, the vent hole is on the engine side of the needle.

Why is it important? Because that is where it is going to get the best vacuum signal. Keep in mind that it is NOT manifold vacuum, because the slide is on the atmospheric side of the throttle butterfly. The vacuum to which it responds is caused by air moving quickly under the slide, in the restricted venturi area caused by the lowered slide.

.

[blowerbike]

ummmm
on GS models they can only go one way..
they have an ear that locates the diaphragm to the carb body.

[850GT_Rider]

Well, see there? I was doing that without even knowing it.

This concludes the hijack.

We now return you to the original thread: Wonder if these nicely-priced diaphragms will work with our bikes? Seems like they should, although they appear to be more substantial - i.e. thicker. Would that change the throttle response?

[bwringer]

If you install these diaphragms, there's no tab, so you'd need to start paying attention to the hole.

The instructions show that you can put a dot of paint on the diaphragm.

I know that these have been used successfully on many GS carbs -- do we have any reports from GS850 carbs (I think they're BS32... not sure on groove diameter)?

[jbthomp]

http://jetsrus.com/individual_parts/007_776_su.html These are cheaper yet.....

[blowerbike]

how much is a slide from suzuki?
the better part of a hundred each....
i have a perfect set of 32mm slides but they are priced accordingly.
cheap is as cheap does.
did anybody read the part about crazy glue? LOL