4th gen carb diaphragms

Yes, please do. That looks almost too cheap to be good but who knows. Since I haven't pulled mine apart to see what they look like I am a bit surprised at how much they look the same as the ones on my Hawk. I will have to check and see it they are the same.

 

I'll post an update when it arrives. Can't do any comparisons with the stock ones, as I don't have spares lying around, but seeing how cheap it was, I thought I'd just take a chance and order one.

 

CB1000 "The Big One" shares those diaphragms

Parts Search Results
Assemblies where 16111-MZ1-000 is used

• 1994 CB1000 A - CARBURETOR COMPONENTS
• 1994 CB1000 AC - CARBURETOR COMPONENTS
• 1994 VFR750F A - CARBURETOR COMP.
• 1994 VFR750F AC - CARBURETOR COMP.
• 1995 CB1000 A - CARBURETOR COMPONENTS
• 1995 CB1000 AC - CARBURETOR COMPONENTS
• 1995 VFR750F A - CARBURETOR COMP.
• 1995 VFR750F AC - CARBURETOR COMP.
• 1996 VFR750F A - CARBURETOR COMP.
• 1996 VFR750F AC - CARBURETOR COMP.
• 1997 VFR750F A - CARBURETOR COMP.
• 1997 VFR750F AC - CARBURETOR COMP.

 

well, that would be helpful to know if those were actually available.

 

I took a quick look at my diaphragms today. Those might work on a 93 but there is no way they will work on a 94-97. I guess I better hope these do outlive me. @squirrelman#1

The design on my 97 puts the vent pretty far from the piston so it has a very long part of the diaphragm that sticks way out. I don't think there will ever be a generic replacement for this part although you might be able to adapt something and fill in with some gasket maker. I just hope it never comes to that.

 

Yeah... sorry for slightly mixing things up, as mine is actually a 3rd gen and not a 4th as per the topic. I guess the carbs are somewhat different between generations.

So the vent is a rather large loop on the edge of the diaphragm rubber on the 4th gen compared to the very small loop on the 3rd gen?

 

yes, pretty large loop.

And the slide is different. Almost a flat plate instead of round.

 

Semi-flatslide.

 

Interesting. Inside the airbox, it is like small velocity stacks too.

 

Wow, I guess they exist but 4 of them would cost almost as much as I paid for the whole bike. No, I am not going to buy these...

https://www.ebay.com/itm/Throttle-V...FV-1997-/362752573766?&_trksid=p2056016.l4276

 

https://www.ebay.com/itm/194205049959

I bought one of these sets. I haven't finished the job yet but all the parts appear to be correct. I am however leaving the original diaphragms in place for now. I could not figure out how the remove the old ones without literally cutting and scraping the pieces out. Since the originals appear to be okay, I decided not to tackle that job. I bought the kit more for the gaskets and float valves. My bike has a fuel leak. Judging from the parts I have removed so far, it seems to be the float bowl gaskets went bad. It is also possible the float valves were leaking.

 

if you haven't ridden the bike for a long time, bowl gaskets may shrink a little and leak, but come back good after exposure to fresh fuel. i've seen that alot.

 

I bought it 3 years ago and it has never really sat. From the looks of the deposits in the gasket areas it's been leaking for a while, maybe even the whole time I have owned it. I didn't really pay attention until my wife kept saying she smelled gas in the garage ( I lost my sense of smell 3 years ago). I do know the previous owner let it sit for long periods of time so maybe that is it. And then it just got worse slowly, maybe?

 

Just an update on this. Did the job yesterday. The pilot screws did not appear to be correct. Maybe they would work but the shape was a bit different so I did not want to risk using them and having to take it all apart again. I did use the new washers to put on my old screws though. The gaskets that go between the carbs and the metal plate seemed to be slightly too big. They were the right shape but my old ones looked good so I just reused them rather than fuss with these to make them work.

 

When I was going through the same thing last year I came across a YouTube vid where a guy removed and replaced a slide diaphram using either fishing wire or dental floss to insert and extract around the central seal. It wasn't on our bikes, but they were very similar Keihin carbs and slides.

You know how these demo vids work, initially it looked like magic. I had to watch it a few times to see how he was managing to do it, then it made sense. But I can't find the vid when I looked today.

Like you chaps, after inspecting them I have left my original items in place. But I have a set of 4 spare diaphrams waiting to be mated to the sliders when the originals do eventually fail. Now I'm going to have to make sure I find and download that vid, and stuck it on a USB stick in the box with the spares.