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Old 10-26-2007, 11:00 AM   #1
valvecrusher OP
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Honda XL carb ?? where does this go?

I took off and cleaned my carbs for my '87 xl250r.

When i was done, i found a small white round plastic "washer" with a small diameter hole in it, laying on my workbench.

All I was doing was taking out the jets, and cleaning them with compressed air.

This part looks like a needle 'seat' or something...it's the same diameter as the jet needle holder and jets...with a hole in the center.

White plastic, a hole in the center, about as thick as a dime...
where the heck does it go?
It looks kinda like a shim for a slide needle..

I promise never to hurry a carb cleaning again...
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Old 10-26-2007, 11:06 AM   #2
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Dood Im high as shit your gonna have to post a pic
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Old 10-26-2007, 11:12 AM   #3
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It's probably the missing sealing washer from Bdirt's hookah...
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Old 10-26-2007, 11:20 AM   #4
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It's the thing the aliens put in your neck, it must've fallen out while you were workin on the carb. Leave it out, it's been makin you loose socks.
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Old 10-26-2007, 03:51 PM   #5
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Take a look

BikeBandit linky
Maybe you can find it here...

http://houseofmotorcycles.bikebandit...0R/1987/188124
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Old 10-26-2007, 08:35 PM   #6
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impressive

Within 20 minutes of my post, two stoner references and one for the Visitors...



Someone out here must have taken an XR carb apart and found this stupid
plastic mini ring like thing

how many white round small plastic rings are in a PH carb set?

OK, now it's one of those few parts fitting that description.

....to narrow it down, it comes out when your messing with the jets..

The only way i know it came off my carbs is that i took off only the carbs and cleaned them right on the stand...

When I moved the bike outside, the 'ring' remained...
in all of it's itty tiny glory right where i had worked the carbs on the lift..


Thanks all..
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Old 10-26-2007, 09:15 PM   #7
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It looks kinda like a shim for a slide needle..


Thats it.

You did have the needle out right?
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Old 10-26-2007, 09:38 PM   #8
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I thought it might BE a shim..

But since i've never shimmed a slide, i wouldn't recognize one if it fell out on my bench and bit......errr...
Also, that makes sense, cause the carb needles are non-adjustable..
Maybe someone who ran it in the 15 years before i got it had a shim in it..
That leans it out right?

Any pics of a shim?

The holes and sizes of the 'ring' in question and the jet oriface and the needle itself are all coincendentally in common with each other...
does that make it even more likely to be a shim?

Where would I get another shim for this carb?
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Old 10-26-2007, 09:55 PM   #9
onaXR
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Quote:
Originally Posted by ValveCrusher
I thought it might BE a shim..

But since i've never shimmed a slide, i wouldn't recognize one if it fell out on my bench and bit......errr...
Also, that makes sense, cause the carb needles are non-adjustable..
Maybe someone who ran it in the 15 years before i got it had a shim in it..
That leans it out right?

Any pics of a shim?

The holes and sizes of the 'ring' in question and the jet oriface and the needle itself are all coincendentally in common with each other...
does that make it even more likely to be a shim?

Where would I get another shim for this carb?
No pics of a shim because the XR/XL use a non adjustable type they vary.
I used a metal washer from radio shack, it just depends on the thickness.
Raise the needle to richen the main circuit. Lower to lean it. So shimming will richen.
I would bet big money thats what you found, long as you did have the needle out.
Put it back in if you liked the way it ran before you took it apart. Measure the thickness with a mic and record it so you'll have a standard to go by if you want to tune it later.
You just have to hunt for shims in a washer bin somewhere like radioshack or home depot ect. Measure each one until you fine the thickness you want. OR buy a jet kit that comes with a adjustable needle and be done with it.
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Old 10-26-2007, 10:21 PM   #10
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I've had alot of XR/XL carbs apart and dont recall anything as your describing. Not showen in the clymer manual I got here. As mentioned, someone, sometime may have shimmed the needle up. It it is a shim, it would have been inside the slide, slid over the needle and under the clip. IIRC, there are some fiber or rubber packing gaskets in the mixture screw areas...are you sure it hard plastic an not petrofied rubber? Also, you said "carbs"...arnt '87 single carbs? I remember the dual carbs ending somewhere around '83 or so.
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Old 11-05-2007, 11:57 AM   #11
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I think it might be part of the air cutoff valve circuit.
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