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petrol tank with many pinholes

Posted: 21 Jan 2011 18:03
by 3potjohn
I now have 3 petrol tanks suitable form my K1, with the single bolt hole at the rear.The one that's on had one small pinhole,now sealed OK.I have a second which is in very good nick albeit brown at present.However my original has a large number of pinholes along the seams and around the fuel tap ports.It says something for the POR-15 that I tried to seal it with that there was only one slight weep. I have removed this material now ( a fun job)
to reveal the true misery of the situation.Would I be correct in thinking that this latter item would be best off at the tip. It goes against the grain to throw stuff out.

Re: petrol tank with many pinholes

Posted: 21 Jan 2011 23:24
by jb666
I've got the same problem with 2 strada tanks. I found www.fueltanks.co.uk and rang them and discussed the problem but haven't gone any further yet - they were helpful and sounded like they knew what they were up to.
Maybe I'll get round to it this year!!

John.

Re: petrol tank with many pinholes

Posted: 22 Jan 2011 09:23
by 3potjohn
I rang the "monkeyhangers" and I can think of about 185 reasons why I have not used them, I don't think my tank is rare enough yet and I'm anticipating Mrs Nash asking for some donations for the NEC bike show soon.But the process looks good.

Re: petrol tank with many pinholes

Posted: 31 Jan 2011 11:47
by sheddweller
I have had trouble with several fuel tanks on bikes I have imported from Japan, with both rust and stale fuel dried out to leave a 20mm crusty layer that is extremely difficult to remove. I have found that the 'Kreem', 3 part liner is fine in tanks with just surface rust, but not so good with pinholes or in tanks with deep, narrow sections. I have had mixed results from 'Por' liner too. I recently bought a product called 'Red-Kote Fuel Tank Liner ', made by Damon Industries from Ohio, USA. You can see some details on the Australian Distributor's site at http://www.ftrs.com.au. This product is thinner than most liners and dries to a transluscent red colour. Unlike most products, it will adhere to a surface with light surface rust, and it is possible to add extra coats to seams or rusty areas. I have seen a sheet of pinholed steel and certainly holes of up to 2mm in diameter had been sealed. Extra coats can then be used to build up the thickness, and it dries to a hard finish. I haven't used it myself yet, but both people I know who have used it are very impressed.
The best way to clean tanks, and prepare them for sealing that I have found is Ultrasonic Cleaning. It also means I don't have to handle nasty chemicals, that then have to be disposed of.
On the prevention side i have recently ordered some fuel taps that were advertised as replacements for Husqvarna and I think Maico dirt bikes on local ebay. These use the same 16x1mm fitting as Morinis and Ducatis, have the fuel exiting horizontally behind the lever, as per the 'reserve' tap on my 500, and have a 5/16 outlet. The best part is that they have a small reservoir and drain at the lowest point so that you can get at any water gathering in your tank. They are even cheaper than the crappy Paoli ones!
Sheddweller