O ring for fuel intake needle valve

[Guest]

Okay noob question.... where do these four 'O' rings go? I ordered a set of rings from cycleorings.com and for the life of me could not figure out where these should go ... I'm assuming my carb was missing them. I also printed out the carb rebuild tutorial and it wasn't obvious from this either. I have an 81 GS650G.

As an FYI - I decided to rebuild the carbs b/c the choke had zero effect...if it was below 85 deg forget about getting it started, but once she was, she ran great! Anyways, I fixed the choke problem, but I think I've introduced a vacuum leak somewhere...has the classic hanging idle. Yes, I did dip the carbs, yes, i made sure i was able to squirt carb cleaner through all the orifices, yes, i replaced the intake O rings as well.

Cheers
Mike

[Steve]

Did you remove the float valve?

That's the little square thing with a point on one end and a little springy pin on the other.

Did you remove the part that it goes into?

You would have had to remove a Phillips head screw to remove the clamp.

Once the clamp is removed, you can remove the float valve seat, and you will find the o-ring around it.

EDIT: if you were looking at Nessism's tutorial (the best one available ), pages 44 and 45 show removing the float valve, page 53 shows the new o-ring in place, ready to install.

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[SqDancerLynn1]

If you took the carb rack apart ?/ There are fuel tubes going to the carbs . They have O rings on each end..

[Bonehead]

I had the same problem for a few minutes. It is in the float needle assembly, the only part inside the carb body (on the inside of the float bowl) that has a Philips head. If you have it already out, it is the part that the float needle goes into. It has a small mesh net on one end with the o-ring next to that. See page 45 in the carb rebuild tutorial. this is the exact part you need to change the o-ring

Well, Steve beat me to it! Still, it is the needle seat. Check it out and get pack to us!

[Steve]

If you took the carb rack apart ?/ There are fuel tubes going to the carbs . They have O rings on each end..

True enough, Lynn, but the thread title is "fuel intake needle valve", and he specifically mentioned "four" o-rings. The fuel transfer tubes use eight o-rings.

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[loud et]

It must be those.
only 4 envelopes come in Bobs CV kit:
1 of 4 mixture screw rings
1 of 12 - 8 for fuel tubes/ 4 for breather T rings
1 of 4 choke rings...and
1 of 4 inlet needle holder rings.
They normally come with a slip of paper withe the designations on them.
And if you followed the tutorial for rebuild the locations of the rings should have been blatently obvious.
Also the tutorials I have seen all include a bench sync description and master idle baseline setting.
The tutorial should easily solve this riddle.

[mhobryan]

And if you followed the tutorial for rebuild the locations of the rings should have been blatently obvious.

The tutorial should easily solve this riddle.

Sorry I wasn't able to solve this 'blatantly obvious' problem, and 'easily solved this riddle'. I'm not some 16 y/o with no experience...I'm 42 and have restored/restified my share of vehicles and keep my DD's (both 2 and 4 wheels) out of the shop most of the time. However, I spent a fair amount of time trying to figure it out, but experienced pointed to something really obvious that I was missing (hence prefacing the question as a newbie question). You know the saying about how good it feels when you stop beating your head against the wall...well I had a pretty good headache going.

I over looked it b/c the float seats simply did not want to come free from the carb bodies and I was afraid of deforming the brass seat so figured it was better to leave well enough alone. I also did not make the connection of "intake needle valve" to "float seat" and assumed any difference in the tutorial to my carbs was b/c it was from a different model GS.

For those who answered politely and tongue in cheek, I appreciate it.

[Nessism]

I suggest you go back and get those float seats out. Use some oil spray and heat on the float seats to see if you can get those O-rings to soften up. The reason they won't come out is because the O-rings are hard and petrified.

[chef1366]

I've seen those ports oxidize and I take some 2000 grit sandpaper and roll it up and clean them out. I use a little vasoline to lube the o-rings before reinstalling them.
If they won't come out without trashing them don't be afraid to hit them with heat with penetrating oil.

[loud et]

Dont over read into words. If you lived anywhere near me I would have pm'd to see if you needed help.
If you misinterpreted MY answer......just wait till you see the blunt personalities of some others here.
You are sure to have a burning resentment soon.
Glad your problem is sorted out. Keep us posted.