Tank refurbed

sfcpiet said:
Sean,

Sure, I can sell you the front mount rubbers, drop me a line with your personal details via PM and we'll work it from there. I have new rears in stock schould you need them, as well as the rubber band. Unfortunately, the quality of todays repro rubber bits is quite shitty, be prepared to renew the rubber band every other season, latest!

The front mount was not the problem causing the leaks on my tank. In the front bottom corners, the sheet that comprises the tank base is folded and creased along the seam weld, mine had multiple fractures in these folds. No amount of soldering was able to stop the weep, didn't want to completely ruin the paint by welding. Sourced a second tank, same happened within 3 years. So I re-furbished the original tank as described, had it lined to be on the safe side and all has been well for the past 6-7 years.

The SF-type tanks have very similar folds and creases, but I can't remember ever having to deal with leaks in this area. The stupidly angled front mounts have been troublesome from the beginning of time though...

piet
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Thanks Piet, but I found some of the soft rubber front mounts in my box of bits - I’ve been collecting bits for a few years in preparation for starting work on the bike. And it’s a nice surprise when I find something I need which I bought a year or two back. Pandora’s box. The rubbers I bought recently for the rear of the tank seem very good, nice rubber and a good fit. And messing around, I think something similar to them could be made to fit under the front of the tank, over the frame tubes, to relieve those dodgy brackets of some pressure.

sounds like I’ve gone down a similar path to yourself. Weld the seams then lined for safety. Bloody expensive so I hope it works out.

Sean
 
Peit, I would be interested in photos of your angled fix, both my sf2 tanks have broken front mounts, and both are awaiting de-rusting and painting, so a good time to modify the mounts.
 
martymoose said:
Peit, I would be interested in photos of your angled fix, both my sf2 tanks have broken front mounts, and both are awaiting de-rusting and painting, so a good time to modify the mounts.
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I can take pics of mine Marty. It's dead simple - same position, but angled about 45 deg. You can even leave one as is and angle the other (tilt the tank slightly when fitting). That way they have up-down support and front-rear support. Once the tank is on you don't even know they're any different.
 
martymoose said:
Peit, I would be interested in photos of your angled fix, both my sf2 tanks have broken front mounts, and both are awaiting de-rusting and painting, so a good time to modify the mounts.
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Marty,

The GTL is scheduled for a big service and clean-up next week, I can send some pics then. I'm a bit crook at the moment, have to stay warm and indoors for a day or 2, impossible for me to nip over to the workshop and rip off the tank just now, sorry. Hopefully Quentin or Lee can supply some pics in the meantime, guessing the solutions will all be very similar. Can't remember if I went the full 45°, but at least 30°. Did all I had hoped for!

piet
 
My original SF1 tank - very much looking worse for wear. But the angled stays are there - you get the idea.
 

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Another trick I used on a borrowed tank that had horizontal stays was to put a cable tie over one of the stays after the tank was fitted to the frame. The cable tie kept the rubber bung confined within the bracket very securely.
 
On the 79 Jota it had horribly hard tank front rubbers. At near reserve I could hear the resonance of the tank through the rev range.

New rubbers from Eades fixed that. The back mushroom rubbers weren’t available at the time, so a multi folded towelling rag over the mushroom heads sufficed.
 
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