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A65 OIF tanks - can anyone shed some light ? #724167
02/03/18 8:19 pm
02/03/18 8:19 pm
Joined: Dec 2017
Posts: 191
England
F
ferretjuggler Online content OP
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ferretjuggler  Online Content OP
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F
Joined: Dec 2017
Posts: 191
England
I've just dug out a rather sorry looking (scabby matt black) four gallon OIF tank.
This is the famed (or hated) "bread box" tank.
I know that its quite an early one because it has the protruding welded seam along the centre line.
From what I was reading (on an eBay listing)there are some detail differences between the Triumph bread box and the BSA version.
This has (as far as I can see) no tank badge screw holes at all.
The fuel tap holes are 2.5" from the rear face of the tank and just over five inches apart.
I've read that some of the Triumph tanks have the petrol taps further forward and the fuel cocks will foul the carbs on a twin carb A65.

I'm hopeful that I have a genuine BSA type tank here.
Have I got my facts right ?

I'm going to dig out my Nitromors shortly, to confirm that there are no screw holes hidden under the paint.

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Re: A65 OIF tanks - can anyone shed some light ? [Re: ferretjuggler] #724214
02/04/18 2:42 am
02/04/18 2:42 am
Joined: Aug 2001
Posts: 3,987
argyll. scotland, uk
gavin eisler Online content
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gavin eisler  Online Content
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Joined: Aug 2001
Posts: 3,987
argyll. scotland, uk
There are quite a few variations in fuel tap location, my mid 70s triumph breadbox tank has the taps further back ( so far back that they are almost too close to the airbox covers , no danger of carb fouling ) than a NOS 72 BSA breadbox, this tank does not have the raised centre seam, apart from the tap location they are identical. Some breadboxes had badge screw holes, the NOS 72 does not, it is the weird green colour all over . At some point I will put up pics of the 70s breadbox in original green, before I have it painted. Will get tap measurements , when I dig them both out.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: A65 OIF tanks - can anyone shed some light ? [Re: ferretjuggler] #724243
02/04/18 1:51 pm
02/04/18 1:51 pm
Joined: Dec 2017
Posts: 191
England
F
ferretjuggler Online content OP
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ferretjuggler  Online Content OP
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Joined: Dec 2017
Posts: 191
England
Thank you.
I've just stripped all the manky paint and glue.
No badge screw holes at all.
No filler either which was a welcome surprise considering this was an autojumble find.

I've had a look at a Triumph seamless version for comparison.
Screw holes to suit small chrome Triumph badges.
No centre seam.
Fuel tap holes much further forward and much further apart.

Re: A65 OIF tanks - can anyone shed some light ? [Re: ferretjuggler] #724250
02/04/18 3:16 pm
02/04/18 3:16 pm
Joined: Nov 2010
Posts: 3,033
Arlington, Massachusetts, USA
kurt fischer Offline

#irideslow
kurt fischer  Offline

#irideslow
Joined: Nov 2010
Posts: 3,033
Arlington, Massachusetts, USA
Here's the Home Market tank I got off e-Bay for my '71 A65L. Which version would you all say I have?

Seems to fit all right, just tight clearance between the rear of the tunnel and the backbone tube.

The way it was:
[Linked Image]

Blasted, pressure tested, repaired:
[Linked Image]

Primed:
[Linked Image]

On the bike:
[Linked Image]


Kurt
1968-70-71 Triumph TR6R Bitsa - 1969 Triumph TR6R - 1971 BSA A65L - 1973 Triumph TR5T
2005 Ducati MTS 1000S DS - 2012 Ducati Hyper 796 - 2014 Kawasaki ZX1000
Re: A65 OIF tanks - can anyone shed some light ? [Re: ferretjuggler] #724254
02/04/18 4:31 pm
02/04/18 4:31 pm
Joined: Dec 2017
Posts: 191
England
F
ferretjuggler Online content OP
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ferretjuggler  Online Content OP
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F
Joined: Dec 2017
Posts: 191
England
That is exactly the same as the one I've just stripped all the paint off.
Looks like I bought the right tank.
More luck than skill.

Re: A65 OIF tanks - can anyone shed some light ? [Re: ferretjuggler] #724262
02/04/18 4:57 pm
02/04/18 4:57 pm
Joined: Nov 2010
Posts: 3,033
Arlington, Massachusetts, USA
kurt fischer Offline

#irideslow
kurt fischer  Offline

#irideslow
Joined: Nov 2010
Posts: 3,033
Arlington, Massachusetts, USA
Originally Posted by ferretjuggler
That is exactly the same as the one I've just stripped all the paint off.
Looks like I bought the right tank.
More luck than skill.


Same here, luck over skill. The e-Bay listing said it was for Triumph and BSA 71-onward.

On fitting it over the frame, Gavin suggested grinding away at the gusset welds on the rear of the backbone tube, which I have done, more grinding needed, however.

The metal at the bottom of the tank at the lowest point was about one molecule thick I think, probably sat a loooong time with water in the fuel, so that needed welding. And the filler neck needed replacing. And lots of other things. But I like it and wanted more capacity than the standard US tank.

Top of my spring "to-do" list is going after the tank mounting and fitting.


Kurt
1968-70-71 Triumph TR6R Bitsa - 1969 Triumph TR6R - 1971 BSA A65L - 1973 Triumph TR5T
2005 Ducati MTS 1000S DS - 2012 Ducati Hyper 796 - 2014 Kawasaki ZX1000
Re: A65 OIF tanks - can anyone shed some light ? [Re: ferretjuggler] #724292
02/04/18 9:17 pm
02/04/18 9:17 pm
Joined: Aug 2001
Posts: 3,987
argyll. scotland, uk
gavin eisler Online content
BritBike Forum member
gavin eisler  Online Content
BritBike Forum member
Joined: Aug 2001
Posts: 3,987
argyll. scotland, uk
Every time I see your' bike Kurt I am a wee bit jealous of the alloy yokes, still lookin good.

Last edited by gavin eisler; 02/04/18 10:22 pm.

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: A65 OIF tanks - can anyone shed some light ? [Re: gavin eisler] #724301
02/04/18 10:37 pm
02/04/18 10:37 pm
Joined: Nov 2010
Posts: 3,033
Arlington, Massachusetts, USA
kurt fischer Offline

#irideslow
kurt fischer  Offline

#irideslow
Joined: Nov 2010
Posts: 3,033
Arlington, Massachusetts, USA
Originally Posted by gavin eisler
Every time I see your' bike Kurt I am a wee bit jealous of the alloy yokes, still lookin good.


Thanks, Gavin, that picture is from a couple of years ago but the bike looks about the same still.

I like the handlebar mount of the B50 front end, makes for easy bar changing, and I may install a chrome bar I have that's a little higher and wider than the Rizoma bar now on the bike.

Back to the tank ... on preventing contact between the tunnel and the backbone, would it be a good idea to fill the gap with rubber instead of leaving an air gap? If so, what kind of rubber, foam or something firmer? Or maybe glue some inner tube scraps to the backbone?


Kurt
1968-70-71 Triumph TR6R Bitsa - 1969 Triumph TR6R - 1971 BSA A65L - 1973 Triumph TR5T
2005 Ducati MTS 1000S DS - 2012 Ducati Hyper 796 - 2014 Kawasaki ZX1000
Re: A65 OIF tanks - can anyone shed some light ? [Re: ferretjuggler] #724354
02/05/18 10:34 am
02/05/18 10:34 am
Joined: Aug 2001
Posts: 3,987
argyll. scotland, uk
gavin eisler Online content
BritBike Forum member
gavin eisler  Online Content
BritBike Forum member
Joined: Aug 2001
Posts: 3,987
argyll. scotland, uk
I use two of the stock mounts one fore , one aft, the ones with square shoulders and an inverted U shape, the long sides of the U help to keep the tank off the frame, a strip of inner tube might be a good idea.
There are several center mount set ups, the later triumph style which comes as a set seems easiest to fit and use, after filing a bit off the heat steady mount welds I have had no rattling issues. The parts book shows two types of centre mount , one for each style of tank, the wee tank stuff wont work with the breadbox.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: A65 OIF tanks - can anyone shed some light ? [Re: ferretjuggler] #724429
02/05/18 10:32 pm
02/05/18 10:32 pm
Joined: Nov 2010
Posts: 3,033
Arlington, Massachusetts, USA
kurt fischer Offline

#irideslow
kurt fischer  Offline

#irideslow
Joined: Nov 2010
Posts: 3,033
Arlington, Massachusetts, USA
Thanks, Gavin, once the temp in the garage stays a consistent 40F or more, I'll go at the BSA tank again.


Kurt
1968-70-71 Triumph TR6R Bitsa - 1969 Triumph TR6R - 1971 BSA A65L - 1973 Triumph TR5T
2005 Ducati MTS 1000S DS - 2012 Ducati Hyper 796 - 2014 Kawasaki ZX1000

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