SOHC.co.uk Forums > CB500/550
Petrol Tank
royhall:
I wouldn't solder it the ethanol likes to eat solder. Will only hold for a short while. I can say from bitter experience it needs to be brazed. Trigger will probably back me up on that.
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florence:
is that modern low lead solder that is the problem? I have some old lead/tin solder, will that be OK?
If not what about epoxy resin?
Bryanj:
If ethanol attacks fibreglass tanks i dont hold up much hope for epoxy. Not sure if i still got the tank from my burnt No 36, if so you may have to take an "essential" drive to Gloucester!!
Moorey:
Its now going up to 5 years since i soldered the bottom of my tank and it is still good so are others i have done. It may well be possible to do a repair at the back of the badge without destroying the paintwork not so with brazing or silver solder. Soldering will certainly be your cheapest option. I use a coroline paste flux as it is easier to keep it exactly where you want it to work. The bakers 3 been a liquid acid could possibly damage your paint if not very careful but as a flux would be ok. I have soldered stainless using Bakers 3 and many think you cant solder stainless steel.
I think Ethanol to be far more problematic with rubber parts rather than the metals. After all Ethanol also corrodes brass and copper, but hay ho.
Remember cleanliness is next to godliness as far as soldering is concerned. If its not clean it will fail.
Moorey:
--- Quote from: florence on March 25, 2020, 07:19:32 PM ---is that modern low lead solder that is the problem? I have some old lead/tin solder, will that be OK?
If not what about epoxy resin?
--- End quote ---
The lead free solder is more prone to cracking where vibrations come into play. Old solder is fine also.
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