[zippythehog]

Hey all,
I have a T300 Sprint. I have disassembled the carbs and split them from the rails (unhhhh) for a cleaning and rebuild.

After I took the slides out, I turned them upside down. I heard something metal fall out of the carbs-only number 1 and number 3. It turns out to be two little brass cylinders about 4mm in outside diameter tapering to about 2mm, with a very small through hole in the middle (maybe 0.5 mm in diameter). There are fuel stains (grey dust) on the tapered end. I looked in number 2- no such device.

Anyone have any idea as to where these things go?

Thanks,
Zip

 

[dgfironworks]

any pics?

 

[9264]

At a very wild guess these are the vacuum orifices for the diaphragms.
<BR>
<BR>Each diaphragm has a hole, about in the corner, on a small lug.
<BR>
<BR>This is the passage where the vacuum is pulled on the diaphragm from the venturi. It also serves to hold the diaphragm in position.
<BR>
<BR>It's the only part I can think of that is close to that description.
<BR>
<BR>I could be very wrong though.

[ This message was edited by: martinyoung on 2007-01-21 05:52 ]

 

[zippythehog]

Pics- I can't get the camera to download pictures to the computer. I'll try again.

Martin, I looked there and those look secure. They are about 6mm long and the small hole runs lengthwise end-to-end.

I'll try to get some pics.

Thanks,
Zip

 

[9264]

Are you saying that the hole on the parts in question crosses the axis as opposed to being along the axis?

 

[zippythehog]

Heh,
I believe I've learned something. Between you all here and a mechanic friend of mine I believe I am referring to the needle jets. The two that I have fit tapered end into the bits that screw into the emulsion tubes. The other end perfectly receives the needle. See, all this time I thought the jets were just the threaded bits that screw into the emulsion tubes.

I think the case is solv-ed (per Clouseau). Now all I have to do is find the one that is missing.

One question: Are these interchangeable or specific to the threaded size (i.e. 125, 127.5 etc)?

It's a learning experience. Thanks for the advice all.

Zip

 

[ocguyocguy]

Unless you removed your jets those pieces should not fall out but alot of times when changing main jets you can actually take out the main and the longer needle jet attached and yes that small piece will then fall out from where it sat on top of the needle jet. It just floats on the top of the needle and is held in place when the jets are in place . It will work with any size main, that does not matter BUT that little piece ONLY SITS ONE WAY PROPERLY...look at it close and you will see how it "fits" on the needle jet top ...hope that helps...

 

[zippythehog]

Yeah,
Thanks ocguy, I've got that more or less sorted. The thing that confuses me is that there are only two of them.

Thanks,
Zip