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Author Topic: 400 Carb O Rings  (Read 6902 times)

Offline Beemer634

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400 Carb O Rings
« on: August 28, 2012, 05:09:21 PM »
Does anyone know the sizes of the 2 O Rings required for the jets? I know that the overhaul set is available but it seems rather costly when only the O rings are needed!
TIA
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'77 BMW R100RS
'77 400/4
'76 750/4
'72 500/4

Offline Bryanj

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Re: 400 Carb O Rings
« Reply #1 on: August 29, 2012, 06:10:19 AM »
Main jet is same as 500 and is 4.2 x 1.1 best of luck finding that size. What other jet are you talking about
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Offline Beemer634

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Re: 400 Carb O Rings
« Reply #2 on: September 09, 2012, 10:13:29 AM »
Apologies for confusion, the second jet is in fact the float valve seat.
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'77 BMW R100RS
'77 400/4
'76 750/4
'72 500/4

Offline Bryanj

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Re: 400 Carb O Rings
« Reply #3 on: September 09, 2012, 04:14:58 PM »
5.7 x 1.3 if its the same as the 500, which i think it is
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Offline Beemer634

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Re: 400 Carb O Rings
« Reply #4 on: September 09, 2012, 04:34:45 PM »
Very many thanks Bryan, now all I need do is find some!

Cheers

Rick
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'77 BMW R100RS
'77 400/4
'76 750/4
'72 500/4

Offline Bryanj

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Re: 400 Carb O Rings
« Reply #5 on: September 09, 2012, 07:28:22 PM »
If you do let me know where and i might get some, I have in the past used slightly oversize ones but they are a sod to fit!
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