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Old 06-15-2011, 07:35 PM   #451
bmwrench
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'79 and '80 used the cylinder base o-rings without a relief in the case-these were the 2.0mm white o-rings which now seem unavailable.
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Old 06-15-2011, 10:57 PM   #452
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Originally Posted by bmwrench View Post
'79 and '80 used the cylinder base o-rings without a relief in the case-these were the 2.0mm white o-rings which now seem unavailable.
thanks Bud.
Mystery solved
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Old 06-16-2011, 11:28 AM   #453
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Quote:
Originally Posted by bmwrench View Post
'79 and '80 used the cylinder base o-rings without a relief in the case-these were the 2.0mm white o-rings which now seem unavailable.
Interesting. BTW - I ordered a set of O-rings from Jeff Trapp at Northwoods Airheads back in April or so and they were readily available then.
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Old 06-16-2011, 08:55 PM   #454
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Originally Posted by Jim K in PA View Post
Interesting. BTW - I ordered a set of O-rings from Jeff Trapp at Northwoods Airheads back in April or so and they were readily available then.
The smaller size went nla from BMW many years ago, but obviously Jeff is sourcing them from elsewhere if they are the smaller of the two.
They used to list two sizes, does Jeff?
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Old 06-17-2011, 01:35 PM   #455
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Originally Posted by wirewrkr View Post
The smaller size went nla from BMW many years ago, but obviously Jeff is sourcing them from elsewhere if they are the smaller of the two.
They used to list two sizes, does Jeff?
I don't see more than one size, but I did not ask Jeff when I ordered what size I was even getting! Ignorance was bliss in that instance. Here is the page with his o-rings: http://www.northwoodsairheads.com/ma...nce-parts.html

I can say that the o-rings looked like the same size as the white ones I took off, and they worked fine and are not leaking after 500 miles or so.
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Old 06-19-2011, 08:16 AM   #456
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I guess I don't understand why one would buy parts from a non BMW source when the prices are pretty much the same. That's just me though.
Oh and as I've seen with lots of other venders just starting out in the parts business, There are more than one application mistakes in his listings.
I like Jeff Trapp, he's a good guy, but the mistakes need to be rectified so people don't buy the wrong stuff. That makes for upset customers.
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Old 06-26-2011, 01:48 PM   #457
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Originally Posted by bmwrench View Post
'79 and '80 used the cylinder base o-rings without a relief in the case-these were the 2.0mm white o-rings which now seem unavailable.
So, if these are NLA what is the appropriate substitute? Sealant w/out an o-ring?
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Old 06-27-2011, 03:01 AM   #458
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Some folks like 3 Bond sealant, instructions are on the pack - it is still sealing after 10 years on my 75/7.
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Old 06-27-2011, 10:59 AM   #459
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Eh? Pricey plastic rings

Has anybody found an alternative source for this?

BMW Part number 31421241649 - 'guide ring'

There is one in virtually every Airhead front fork damper since 1980 and they cost US$21.76 each!
Due to Regional pricing were I live, they cost the equivalent of $37.50 apiece.

I haven't actually weighed one, but I suspect this tiny teflon trifle of a part is more costly than its equivalent weight in pure gold!
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Old 06-28-2011, 02:33 PM   #460
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Expensive little part. I would think someone could make this part for under $10.00.
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Old 07-01-2011, 08:39 AM   #461
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Old 07-01-2011, 10:13 PM   #462
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Old 07-02-2011, 04:59 AM   #463
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Old 07-08-2011, 05:44 PM   #464
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I've searched this thread and can't kind the info I need, so I'll ask.

I've got a 1978 r80 with points ignition. (not the bean can) this there any points from the local store interchangable with the originals?

also, I read in this thread that points from china don't last. I've looked at bobsbmw site and they have the parts I need. are these quality parts?(oem) price is a little high but if they're good quality I would rather get those.

thanks for any info.
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Old 07-09-2011, 06:42 AM   #465
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Originally Posted by saddlsor View Post
I've searched this thread and can't kind the info I need, so I'll ask.

I've got a 1978 r80 with points ignition. (not the bean can) this there any points from the local store interchangable with the originals?

also, I read in this thread that points from china don't last. I've looked at bobsbmw site and they have the parts I need. are these quality parts?(oem) price is a little high but if they're good quality I would rather get those.

thanks for any info.
The points for the early Airheads are a one off type. Much like the oil filters, low volume equals high cost. You will not find an equivalent anywhere. Bobs has a great rep with regard to knowledge for correct parts for these machines. You're on the right track.

If you add the Dyna Booster, the points will last 3 or 5 times as long. Update to the Dyna III ignition and no more points at all.
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