[Herbert Chapman]

Look at the picture. That little bugger with the arrow pointing to it fell out of my carb while I was overhauling (ruining) it.



The prize? I am Landed Gentry here in England so I can bestow a title on you if you answer the question. Arise Lord ******* of Arknasas

 

[IanSmith]

Is it called Rob? Rob the rubber round thing!

 

[Shep]

I've replied on my Forum.I can't say I've seen that washer/O-ring in these carbs but could be wrong.



Note:some carb kits come with extra washers/O-rings that are not needed on our machines/models.

 

[Herbert Chapman]

Is it called Rob? Rob the rubber round thing!

Don't be bloody ridiculous man - as an Aussie you should know it's called Bruce - Bruce the bastard, little black thing that's bollocksed my bike

 

[Toehead]

Look at the picture. That little bugger with the arrow pointing to it fell out of my carb while I was overhauling (ruining) it.



The prize? I am Landed Gentry here in England so I can bestow a title on you if you answer the question. Arise Lord ******* of Arknasas

It kind of looks like the little Oring that goes on the air cutoff valve.

 

[Shep]

It looks too large for that and also the O-ring in the Air-cut-offs is shaped to be fitted only one way.



HTH

 

[Toehead]

It's too large for that and also the O-ring in the Air-cut-offs is shaped to be fitted only one way.



HTH

I that case I urgently await the answer

 

[Crshndbrn]

It does look like the air cut off valve o-ring, if you notice the o-rings on the right look to be an enlarged view compared to the port cap on the left.

 

[Blindstitch]

I think someone threw it in your carbs just to screw with you. Do they both have one?

I have Larry's carb book out right now and I don't see anything like that.

 

[Linny]

The mod for nowhere.

 

[Blue Fox]

Did all of those O rings come out of one carb? I don't remember that many in there. The 80 model, I don't think has a accelerator pump(?). The idle mixture O ring would seem to be smaller than any pictured. That would just leave the transfer tube O ring, and the ACV O ring as the complete lot. Is it hard rubber? The bumper stop in the vacuum cylinder uses a hard plastic end, but it is usually white. Maybe a ruler along side would give us a scale to go by.

 

[Allan]

Did all of those O rings come out of one carb? I don't remember that many in there. The 80 model, I don't think has a accelerator pump(?). The idle mixture O ring would seem to be smaller than any pictured. That would just leave the transfer tube O ring, and the ACV O ring as the complete lot. Is it hard rubber? The bumper stop in the vacuum cylinder uses a hard plastic end, but it is usually white. Maybe a ruler along side would give us a scale to go by.

I believe the 80(or at least some of them) do have the accelerator pump. I don't have one on mine right now because I have carbs from a 78 on it but the set that came off of it has a pump. I think the o-ring for the pump is just a normal round ring though.

 

[Cobram]

Flip the kidney shaped piece upside down and see if it fits. Looks like a bushing used for universal fit.

Could also be the nylon piece at the top of the velocity stack, but IIRC those were usually white.



I believe it's called the Nansensuson Disjointed Bushing. The Japanese characters that name it are so complicated that no computer has the capability to reproduce them.

 

[Herbert Chapman]

Many thanks for your input fellas



I am now confident that it came out from under the cut-off diaphragn cover. Both carbs have exactly the same one and it does fit OK (the size in the pic, btw, is not to scale with the black banana - it is actually much smaller. I got the pic here ) I reckon the PO bought himself a refurb kit and used these because they sseemed to fit. I'll see how they go when I re-assemble tomorrow

 

[Shep]

Just for reference it's this one,

 

[shadowjack1020]

Just for reference it's this one,

If you look carefully, it has a flat side and a rounded side. The flat side goes into the recess for it and the rounded side goes to the cover.

 

[Rusty Bikes]

If you look carefully, it has a flat side and a rounded side. The flat side goes into the recess for it and the rounded side goes to the cover.

Very well, I already have the title of Baron in another life.

Rusty

 

[rlcorn64jh]

Shep nailed it with a picture. Several folks knew it is used in the cutoff valve portion of the carb.



I had a run-in with a Canadian bike parts vendor about this exact part. I ordered 4 cutoff valves (for 2 bikes). All the kits came without that little tiny part (it was pictured in their ad on eBay). It took over a MONTH for them to get me 4 little washers. In the meantime, I gave the vendor as many "BAD FEEDBACK" remarks in that they hadn't responded to me. I haven't done business with Sirius since.



I like the idea of having a BAD VENDOR STORY forum.



Russ from Danbury, CT



- - - - - - - -

13 cx500's 78-81 Seven run. 6 in process.

 

[Shep]

Shep nailed it with a picture. Several folks knew it is used in the cutoff valve portion of the carb.



I had a run-in with a Canadian bike parts vendor about this exact part. I ordered 4 cutoff valves (for 2 bikes). All the kits came without that little tiny part (it was pictured in their ad on eBay). It took over a MONTH for them to get me 4 little washers. In the meantime, I gave the vendor as many "BAD FEEDBACK" remarks in that they hadn't responded to me. I haven't done business with Sirius since.



I like the idea of having a BAD VENDOR STORY forum.



Russ from Danbury, CT



- - - - - - - -

13 cx500's 78-81 Seven run. 6 in process.

We had started one on the old forum and for good Vendors like in the UK,

David Silvers

Wemoto

John Oldfield.



Motad 2 into 1 Exhausts



USA for me

Georgefix via Ebay.