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#714865 - 11/13/17 12:46 pm BSA fuel tank  
Joined: Aug 2001
Posts: 48
mtrude Offline
BritBike Forum member
mtrude  Offline
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Joined: Aug 2001
Posts: 48
Hermon N.Y.
Hello, I have a 1968 BSA Spitfire, with a very nice but non original paintjob. The fiberglass tank leaks, it has been sealed at least once before. I would like to use a metal tank, Are Lightning and Thunderbolt tanks the same? I have a Thunderbolt tank (flat bottom) but It needs the rear of the tank raised to prevent fouling of the carb cables. I have seen tanks with recesses cut where the cables run, and tanks with a long curved recessed area , a 1968 tank would be nice,Thanks mtrude

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#714927 - 11/13/17 11:21 pm Re: BSA fuel tank [Re: mtrude]  
Joined: Aug 2001
Posts: 6,666
Jon W. Whitley Online content
Jon W. Whitley  Online Content



Joined: Aug 2001
Posts: 6,666
Vermont
Or, you could use one of the new...reproduction Spitfire-Hornet tanks. They come in alloy and steel versions. Available from the UK and India. Several threads on this site regarding them. I have a steel one from a trusted source in India and it is well made and looks just like my original fiberglass tank. Pummy.8081 is the seller on eBay.


Jon W.


1957 6T Thunderbird 650
1971 TR6R Tiger 650
1955 Tiger 100 - Project
1970 BSA A65F 650 - Project

#714968 - 11/14/17 2:29 am Re: BSA fuel tank [Re: mtrude]  
Joined: Aug 2001
Posts: 4,191
Mark Z Online content
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Mark Z  Online Content
BritBike Forum member

Joined: Aug 2001
Posts: 4,191
Owego, NY, USA
Not sure what you mean by "flat bottomed", do you mean it has no channel for the frame? In that case, it would not be a Thunderbolt tank. Or do you mean with a channel, but otherwise flat on the bottom, with a seam around the bottom edge? That would make it a '66. I don't know about the Spitfire tank, but Lightning and Thunderbolt tanks (which are the same) are supported by two rubber "half-donuts", front and rear, and the rear one is bigger or smaller (I think smaller) than the front. There should be enough room for the cables between the frame and the tank channel, below the "donuts". Where the left cable crosses over, it will be under the frame. Anyway, the frames are all the same.

But if you're willing to spend some bucks, Jon's idea sounds like an excellent one!


Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
#715031 - 11/14/17 2:35 pm Re: BSA fuel tank [Re: Mark Z]  
Joined: Aug 2001
Posts: 48
mtrude Offline
BritBike Forum member
mtrude  Offline
BritBike Forum member

Joined: Aug 2001
Posts: 48
Hermon N.Y.
Thank you for the replies, the Thunderbolt tank has no seam on the bottom and the cap matches the fiberglass tank cap so believe it to be the same year? What I mean by "flat bottom" is that I have seen photos of fuel tanks with a recess, or cavity built into bottom of the tank on each side near the petcocks where the carb cables would run. I thought that this may be for twin carburetors? The tank has a channel for the frame backbone . It could be my tank rubbers are incorrect. Probably as they are from the stock fiberglass tank.I really like the idea of the reproduction steel tank but I cannot find that seller on eBay? Is any contact information available? Thank You, Mike

#715057 - 11/14/17 4:17 pm Re: BSA fuel tank [Re: mtrude]  
Joined: Dec 2004
Posts: 8,889
kommando Online content
kommando  Online Content


Joined: Dec 2004
Posts: 8,889
Scotland
This is pummy's shop on eBay.co.uk but there will be a .com version

http://stores.eBay.co.uk/royalcrusaders/

and his profile

https://www.eBay.co.uk/usr/pummy.8081?_trksid=p2053788.m1543.l2754

#715137 - 11/14/17 11:53 pm Re: BSA fuel tank [Re: mtrude]  
Joined: Aug 2001
Posts: 6,666
Jon W. Whitley Online content
Jon W. Whitley  Online Content



Joined: Aug 2001
Posts: 6,666
Vermont
I believe they sell under more than one eBay store/handle. This tank and judging by the username is most likely pummy.8081. I purchased my tank from the same exact ad a few years ago but the seller was pummy.8081 at that time. Same price too. My tank is pretty nice in my opinion. None of us like to lose money but for the price, it is worth a try to me. Not expensive and if for some reason it didn't show up, a buyer could get their money back through PayPal, so no worries there. Definitely worth the effort IMO.

Spitfire-Hornet Gas Tank


Jon W.


1957 6T Thunderbird 650
1971 TR6R Tiger 650
1955 Tiger 100 - Project
1970 BSA A65F 650 - Project

#715155 - 11/15/17 2:40 am Re: BSA fuel tank [Re: mtrude]  
Joined: Aug 2001
Posts: 4,191
Mark Z Online content
BritBike Forum member
Mark Z  Online Content
BritBike Forum member

Joined: Aug 2001
Posts: 4,191
Owego, NY, USA
Originally Posted by mtrude
Thank you for the replies, the Thunderbolt tank has no seam on the bottom and the cap matches the fiberglass tank cap so believe it to be the same year? What I mean by "flat bottom" is that I have seen photos of fuel tanks with a recess, or cavity built into bottom of the tank on each side near the petcocks where the carb cables would run. I thought that this may be for twin carburetors? The tank has a channel for the frame backbone . It could be my tank rubbers are incorrect. Probably as they are from the stock fiberglass tank.I really like the idea of the reproduction steel tank but I cannot find that seller on Ebay? Is any contact information available? Thank You, Mike


Ok I get it now. No seam at the bottom edge makes it a '67-'70, '67 having the smaller Lucite badges, '68-'70 the larger die-cast badges. No, no relief for carb cables, but with the correct tank supports, there should be enough room for the cables to curve up and over across the bottom of the tank. I guess it does put a rather sharp bend in the cables. (I don't remember because I've run Mikunis ever since 1984, which may be even higher. I put fuel line around the cables to even out the curve and to keep the cables from scuffing the bottom of the fuel tank.) Someone in another post mentioned curved ferrules for the tops of the carbs, but that may have been for Mikunis. If they make those for AMAL carbs, that would be a good fix.


Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
#715172 - 11/15/17 8:12 am Re: BSA fuel tank [Re: mtrude]  
Joined: Dec 2004
Posts: 8,889
kommando Online content
kommando  Online Content


Joined: Dec 2004
Posts: 8,889
Scotland
Only buy from pummy, if you look at the other guys feedback he is not checking the stuff he sells unlike pummy.

#715190 - 11/15/17 12:45 pm Re: BSA fuel tank [Re: mtrude]  
Joined: Aug 2001
Posts: 48
mtrude Offline
BritBike Forum member
mtrude  Offline
BritBike Forum member

Joined: Aug 2001
Posts: 48
Hermon N.Y.
Thanks for the replies, Im considering the bare steel tank with no cap, or am I better off with a painted tank with a cap, and repaint that? Just wondering as far as fitting the cap to the tank? Probably over thinking that problem. Thank You, again, Mike


Moderated by  Allan Gill, Jon W. Whitley 


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