SOHC.co.uk Forums > CB750
rust inside tank
bobthebuilder:
Hi Guys,
Anyone out there know how to clean rust of inside of tank, or is it that a daft question, should I bin it
Jock. :-\
SteveD CB500K0:
Never bin a tank!
I've never tried it but I hear that a selection of old nuts and bolts, together with some old fuel, is a good way of getting the rust out.
Unfortunately, unless you are going to keep it full of fuel, you will need to coat the inside with one of the proprietary tank liners.
Rozabikes Tim:
Have read on "tinternet" about people doing this by electolysis method. get rid of this worst with shaking / bolts method, the basically filling tank with water some salt and and setting up anode and diode connected to a battery. I'm no scientist but there were possitive reports. May have been on US sohc site, don't know. Google it!
AshimotoK0:
Jock - if it has wrinkles visible through the filler cap then keep it and restore it whatever, as these are ultra rare. Mine does not have this feature although it was built in Oct 1969 and I am convinced it is the original tank shipped with the bike to the UK in Jan 1970.
The painter I used recommended Flowliner if the inside is rusty but you need to treat the rust first. I think some of the tank preps come with a rust remover (possibly phosphoric acid).
http://www.flowliner.co.uk/
Look here for help on the SOHC4 Us site. This is always your first stop for info.
http://forums.sohc4.net/index.php?action=search2
Search for tank, rust, etc there is lots on there but it can take a bit of finding
If it is really bad and non wrinkle then a later tank should be available to restore on Ebay but make sure the tap is on the same side as yours as Honda switched sides on later bikes.
cheers
Ash
PS who is rebuilding your motor? what kind of condition was it in?
Spitfire:
A friend of mine used to swear by this stuff, never tried it myself though.
http://www.mandp.co.uk/productinfo/501102/Workshop/Workshop-others/Petseal
Cheers
Den
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