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Beemer100
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Germany
Joined: 05/15/2018
Posts: 51

Hello,

apparently the number on the Bing main jets (and idle jets) does not correspond to the diameter of the jet but it's some kind of measurement of the through-put. Is there a table available which I can use to translate this through-put into diameter (so that I can actually measure the jets with a jet gauge)?

Hope, what I write is clear ...

thanks
Klaus

schrader7032
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VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6652
Hmmm...I actually thought

Hmmm...I actually thought that the number did represent a physical value of the opening. Possibly it's the area of the opening? I don't have my Bing book where it defines this.

__________________

Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

Beemer100
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Germany
Joined: 05/15/2018
Posts: 51
same for me, Kurt. I always

same for me, Kurt. I always thought that the 130 Bing main jet has a 1,3mm hole and I can cross check it with my gauge. But now I heard that this is not the fact (https://www.bmwclassicmotorcycles.com/parts/part-review/bing-jets/)

I always cross check the jets I buy and I always found that I had to rework them to match my gauge ... now I learnt, that this seems to be wrong. Good thing is that the gauge is always bigger ... means, I always run with a too big jet.

Jets are getting clogged over time so an easy way to cross check would be helpful I guess ...

best regards
Klaus

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