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Old 04-02-2013, 12:58 PM   #1
CanadaBiker OP
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how to remove jet needles

I want to replace the jet needle (nozzle needle in the fiche) but I can't figure out how to remove them. My manual says something about push and twist, but I can't figure it out. The fiche shows clips and toothed rings, but as I understand it, not all models use those clips?

Also, once I get them out, it must be challenging to get them back in at the right groove? Any advice?

Thanks
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Old 04-02-2013, 01:29 PM   #2
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Twist the needle 90 degrees or 1/4 turn and gently push up on the needle. Continue the 90 degree rotation until the needle comes out. Count the number of turn to determine what groove it was in. You can also measure how far the needles stick out to get the same location when they are replaced. It becomes pretty obvious how that works when you actually see the needle.

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Old 04-02-2013, 02:09 PM   #3
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+1

it helps to wear latex gloves or similar for a slip-free grip between fingers while turning the needle through 90 degrees, at which point it can be drawn to the next pair of opposed notches, or out as the case may be.
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Old 04-02-2013, 03:16 PM   #4
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You probably have to have Latex or some type of glove to get a grip on the smooth needle. I didn't have any nice clean new latex gloves the last time I did this and ended up with an old pair of gardening gloves in heavy rubber.

Well it worked.

Your leather motorcycle gloves probably won't work. The needle is slippery.
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Old 04-03-2013, 01:54 AM   #5
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Quote:
Originally Posted by CanadaBiker View Post
I want to replace the jet needle (nozzle needle in the fiche) but I can't figure out how to remove them. My manual says something about push and twist, but I can't figure it out. The fiche shows clips and toothed rings, but as I understand it, not all models use those clips?





Also, once I get them out, it must be challenging to get them back in at the right groove? Any advice?

Thanks
record how much they stick out before you remove them. Just make a mark on a 3x5 card.
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Old 04-03-2013, 08:17 AM   #6
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Old 04-03-2013, 11:03 AM   #7
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So i got the jet needles out, but damn, the new ones I ordered from Maxbmw are much longer. And the taper profile is much different. The part number seems correct, and it matches the fiche...

Anyone have this problem?
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Old 04-03-2013, 11:07 AM   #8
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Quote:
Originally Posted by CanadaBiker View Post
So i got the jet needles out, but damn, the new ones I ordered from Maxbmw are much longer. And the taper profile is much different. The part number seems correct, and it matches the fiche...

Anyone have this problem?

What are the markings on them? There should be an X or some other markings to denote which needle is which.
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Old 04-03-2013, 11:13 AM   #9
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Originally Posted by blaine.hale View Post
What are the markings on them? There should be an X or some other markings to denote which needle is which.
I just now looked very closely and I can't see any markings.
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Old 04-03-2013, 11:16 AM   #10
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Originally Posted by CanadaBiker View Post
I just now looked very closely and I can't see any markings.
Now that I think about it...I may have imagined doing that on my bings. I think I did that for my Amals haha.
Sorry, way too many carbs in my life at the moment.
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Old 04-03-2013, 11:30 AM   #11
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I've used lightweight Vice Grips, set real low on the squeeze scale, with rubber strips on the teeth. The job got done, but I almost had heart trouble while doing it. Latex gloves seems like a good idea.
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Old 04-03-2013, 11:43 AM   #12
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So I think I've tracked down the issue of the differing lengths on the new nozzle needles. The fiche at Maxbmw is wrong, in that it lists the part number for the 40mm carbs instead of the 32mm carbs. uggggggg

fwiw, In fairness to MAX, the fiche at Bobs is wrong too, so maybe it's an error coming from the main BMW fiche.

still uggggggggggg
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Old 04-03-2013, 01:25 PM   #13
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Eek Wait... what?

I just ordered all new needles, jets, and whatnot from Max. Are you telling me they are the wrong part now? So what's the correct part number?
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Old 04-03-2013, 01:53 PM   #14
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I just ordered all new needles, jets, and whatnot from Max. Are you telling me they are the wrong part now? So what's the correct part number?
Not sure for your bike, but the 32mm Bings use nozzle needle (jet needle) 13111255840.

However the fiche, at least for my bike, lists the part as 13 11 1 335 321, which is actually for the 40mm Bings. The confusion is that many of the R100s have the 40mm carbs, but the 'plain jane' R100/7 uses the 32mm carbs.

Clear as mud? :)
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Old 04-03-2013, 02:31 PM   #15
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Bluhduh Even muddier now.

I have 32s on my 91GSPD, and the fiche says PN 13 11 1 337 692 I guess I'll see what happens when I get them apart.

Oh, sorry, I'm probably just confusing things, didn't realize you guys are talking about 70's bikes which probably had different bings. Nevermind me.
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