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Air filter O ring seal #740145
06/28/18 4:17 pm
06/28/18 4:17 pm
Joined: Dec 2006
Posts: 322
Glenwood, Iowa USA
TBolt72 Offline OP
BritBike Forum member
TBolt72  Offline OP
BritBike Forum member
Joined: Dec 2006
Posts: 322
Glenwood, Iowa USA
I'm looking for a part number and/or picture of the O ring seal for my 1968 Norton Atlas. It has the original wedge shaped air filter housing, mounted on original 930 Concentric carbs. There is a plate that is mounted to both carbs and a sleeve for each carb. Onto those 2 sleeves are thick O rings or seals. I cant find them in the parts manual and the parts guy at Baxters doesn't know what I'm talking about.

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Re: Air filter O ring seal [Re: TBolt72] #740147
06/28/18 4:32 pm
06/28/18 4:32 pm
Joined: Dec 2006
Posts: 322
Glenwood, Iowa USA
TBolt72 Offline OP
BritBike Forum member
TBolt72  Offline OP
BritBike Forum member
Joined: Dec 2006
Posts: 322
Glenwood, Iowa USA
I suppose I could use rubber grommets.

Re: Air filter O ring seal [Re: TBolt72] #740155
06/28/18 5:26 pm
06/28/18 5:26 pm
Joined: Aug 2001
Posts: 1,279
Hamilton, Mass. USA
D
Dave Comeau Offline

Crew Chief
Dave Comeau  Offline

Crew Chief
D
Joined: Aug 2001
Posts: 1,279
Hamilton, Mass. USA
I have used both thru wall grommets and AS568 O-Ring Spec dash 328 o-rings should fit both Monobloc or Concentric if using the correct adaptors.
Look here to verify the size...
https://www.marcorubber.com/o-ring-size-chart-as568.htm


dynodave
BSA 3 1961-1963
Ducati 3 1992-2002
Norton many 1951-1975
87 Serv-Equip 100HP MC brake dynamometer,
Re: Air filter O ring seal [Re: TBolt72] #740501
07/02/18 1:41 pm
07/02/18 1:41 pm
Joined: Dec 2006
Posts: 322
Glenwood, Iowa USA
TBolt72 Offline OP
BritBike Forum member
TBolt72  Offline OP
BritBike Forum member
Joined: Dec 2006
Posts: 322
Glenwood, Iowa USA
I found a shovelhead intake O ring fits perfectly and is a stretch fit onto the carburetor intake sleeve.


Moderated by  Dave Comeau 


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