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BSA OIF gas tank slimline (US model) #717258
11/30/17 6:34 pm
11/30/17 6:34 pm
Joined: Nov 2010
Posts: 3,002
Arlington, Massachusetts, USA
kurt fischer Online content OP

#irideslow
kurt fischer  Online Content OP

#irideslow
Joined: Nov 2010
Posts: 3,002
Arlington, Massachusetts, USA
Recently I saw a used "slimline" tank advertised for sale as "hard to find" -- at least it didn't say "rare" -- ad stated that the tank needed a lot of work, for sale at $175.

I have one of these tanks that I was going to use but went with a Home Market tank instead. About five years ago, I brought the slimline to Don Hutchinson for his re-working, media blast, pressure test, weld leaks, solder filler neck, pressure test again. After the media blast and pressure test, it was found to be leaking like a sieve, it seems like the paint had been holding the fuel in. So we didn't go any further at the time, and I hung it in the garage. It sure looks a lot better to me than the one advertised at $175.

So now I want to decide, sell it to someone who needs it, keep it as is for future use on my '71, or start repairing it for my own use. Just a couple of small dings, and one spot repaired with a nail, it appears.

Questions --

Are these tanks hard to find?

What are they "worth"?

Best ways to repair -- remove braze? weld plates over the sieve areas?


[Linked Image]BSA gas tank slim line OIF by Kurt, on Flickr

[Linked Image]BSA gas tank slim line OIF by Kurt, on Flickr

[Linked Image]BSA gas tank slim line OIF by Kurt, on Flickr

[Linked Image]BSA gas tank slim line OIF by Kurt, on Flickr

[Linked Image]BSA gas tank slim line OIF by Kurt, on Flickr

[Linked Image]BSA gas tank slim line OIF by Kurt, on Flickr

[Linked Image]BSA gas tank slim line OIF by Kurt, on Flickr

[Linked Image]BSA gas tank slim line OIF by Kurt, on Flickr













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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Re: BSA OIF gas tank slimline (US model) [Re: kurt fischer] #717354
12/01/17 7:25 am
12/01/17 7:25 am
Joined: May 2004
Posts: 3,740
Sydney Australia
B
BSA_WM20 Offline
BritBike Forum member
BSA_WM20  Offline
BritBike Forum member
B
Joined: May 2004
Posts: 3,740
Sydney Australia
That tank is stuffed virtually beyound repair.
Firstly it is cracking along the stressed area of the lip and that tels me it needs to be annealed.
The chances of that being done without distorting the tank is very low

Secondly the idiot moron who attacked the tank with the wrong material went in way too hot, thus the pinholes in the fill .
Having had copper baked into the steel you can no longer weld it with proper steel rods necause the copped diffuses into the steel.

You might be able to get a silver solder ( not solder with 1% silver ) to take, but it will be hit & miss and all of that crud has to be ground off.
Silver solder will join but it will not fill in the holes which will probably burn back the instant you touch it with a torch.
If you can get the splits welded up, the pinholes can be covered over with lead wipe, but there is a limit to how big a hole it can bridge.

That tank is as common as breathing, there is no shortage of them and I think MIke Riley still has them NOS.
So IMHO worth keeping becaue eventually they might become rare or to use as a pattern but not economic to repair.


Bike Beesa
Trevor
Re: BSA OIF gas tank slimline (US model) [Re: kurt fischer] #717364
12/01/17 9:35 am
12/01/17 9:35 am
Joined: Aug 2015
Posts: 1,160
Bolton Lancs UK
A
Andy Higham Offline
BritBike Forum member
Andy Higham  Offline
BritBike Forum member
A
Joined: Aug 2015
Posts: 1,160
Bolton Lancs UK
The cracks around the seams are common on those tanks.
Pin holes mean the tank is very rusty inside and you could be chasing them forever


1955 BSA B31 500cc "Stargazer"
1962 Greeves 200cc "Blue Meanie"
1962/67 Greeves 350
1967 Greeves 360 Challenger
1984 Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500cc sprint/LSR bike "Deofol"
Jawa 500cc "Llareggub"
2003 Aprilia RSV Mille "Lo Stregone"
Re: BSA OIF gas tank slimline (US model) [Re: kurt fischer] #717369
12/01/17 12:43 pm
12/01/17 12:43 pm
Joined: Nov 2010
Posts: 3,002
Arlington, Massachusetts, USA
kurt fischer Online content OP

#irideslow
kurt fischer  Online Content OP

#irideslow
Joined: Nov 2010
Posts: 3,002
Arlington, Massachusetts, USA
Thanks, Trevor, Steve.

That's what I was thinking, but I remind myself often, "Don't believe everything you think."

Funny that a respected dealer called his tank hard-to-find. Maybe depends where you're at.

I don't mind that my tank was blasted aggressively. Otherwise, I might have painted a paper-thin tank that would have come apart in service.

So I'll just hang it from the garage rafters again, until it becomes *rare* -- I should live so long.


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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