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Oil Tank Filter Whitworth Size #728394
03/12/18 2:30 pm
03/12/18 2:30 pm
Joined: Mar 2018
Posts: 4
Downers Grove, IL
A
A65Mike Offline OP
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A65Mike  Offline OP
BritBike Forum member
A

Joined: Mar 2018
Posts: 4
Downers Grove, IL
Hi All. I am working on an A65 that has been in storage many years. The oil tank filter 68-8328 is frozen in place. I am soaking to free up.
I believe the filter is a Whitworth size. However, my new Whitworth set does not include that size.
Anyone know what size the "bolt" head is on the oil tank filter?
Thank you!

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Re: Oil Tank Filter Whitworth Size [Re: A65Mike] #728405
03/12/18 4:31 pm
03/12/18 4:31 pm
Joined: Feb 2012
Posts: 297
Southampton UK
P
Peter Gascoigne Offline
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Peter Gascoigne  Offline
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Joined: Feb 2012
Posts: 297
Southampton UK
On mine a 1" a/f is a very good fit.


1971 BSA A65 Lightning "Bitsa"
1966 BSA A65 "Beezuki" with GT550 two-stroke engine
1974 Triumph T150 830cc
1975 Suzuki GT550
1975 Laverda 1000 3C
1986 Yamaha SRX 600
Re: Oil Tank Filter Whitworth Size [Re: A65Mike] #728414
03/12/18 5:32 pm
03/12/18 5:32 pm
Joined: Sep 2004
Posts: 903
Farnham, Surrey, UK
gunner Offline
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gunner  Offline
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Joined: Sep 2004
Posts: 903
Farnham, Surrey, UK
On my A65 the existing oil tank filter hex is 9/16 Whitworth, however I also have a spare filter specifically advertised as being for A65's and the hex is 5/8 Whitworth. I don't know why there is a difference or what the original hex size was though I suspect it was 9/16 Whitworth.

There's a handy conversion table At this Link which shows the commonly used Whitworth / B.S.F to SAE / A.F (inches across flats) sizes and conversions to metric and decimal inch dimensions.




Last edited by gunner; 03/12/18 5:42 pm.

1968 A65 Firebird
1967 B44 Shooting Star
1972 Norton Commando
Re: Oil Tank Filter Whitworth Size [Re: A65Mike] #728419
03/12/18 6:07 pm
03/12/18 6:07 pm
Joined: Oct 2006
Posts: 2,981
Elburn, Ill. USA
I
Irish Swede Offline
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Irish Swede  Offline
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Joined: Oct 2006
Posts: 2,981
Elburn, Ill. USA
Have you tried what the British call "an adjustable spanner, " also known in the USA as a "crescent wrench," also
known as a "Hillbilly fits-all?"

Re: Oil Tank Filter Whitworth Size [Re: A65Mike] #728420
03/12/18 6:07 pm
03/12/18 6:07 pm
Joined: Oct 2006
Posts: 2,981
Elburn, Ill. USA
I
Irish Swede Offline
BritBike Forum member
Irish Swede  Offline
BritBike Forum member
I

Joined: Oct 2006
Posts: 2,981
Elburn, Ill. USA
Have you tried what the British call "an adjustable spanner, " also known in the USA as a "crescent wrench," also
known as a "Hillbilly fits-all?"

Re: Oil Tank Filter Whitworth Size [Re: A65Mike] #728450
03/13/18 1:56 am
03/13/18 1:56 am
Joined: Mar 2018
Posts: 4
Downers Grove, IL
A
A65Mike Offline OP
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A65Mike  Offline OP
BritBike Forum member
A

Joined: Mar 2018
Posts: 4
Downers Grove, IL
Hey, thanks for all the posts. Much appreciated! My 9/16 Wentworth didnt fit so I'm guessing its the 5/8 Whitworth. I'll get one while it soaks some more.
I already nicked a corner with my crescent before my original post. Its locked in but good.


Moderated by  Allan Gill, Jon W. Whitley 


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