Fuel tank warping, good ending
Printed From: rsvr.net Forums
Category: Tuono
Forum Name: General & Technical
Forum Description: Everything and anything to do with the Terrific Tuono... the ultimate Streetfigher!
URL: http://www.rsvr.net/forum_posts.asp?TID=29524
Printed Date: 27 Mar 2026 at 04:53
Software Version: Web Wiz Forums 12.07 - https://www.webwizforums.com
Topic: Fuel tank warping, good ending
Posted By: MikeyR
Subject: Fuel tank warping, good ending
Date Posted: 23 Feb 2022 at 16:31
Thought I'd service my Tuono's 15 yr old pump so ordered new filter, hoses, flange seal to do the job just once and fully. Made a hand pump to drain the tank, disconnected all the connected bits and removed the tank. I could see the pump had been out before and had been stuck/bonded back in with A LOT of black goo, looked like it was silicon based  . Two hours later with a modelling knife and patience, the pump was out, another 30 mins cleaning the flange surfaces and it was clear why the sealant had been needed. There was at least 1mm of waveyness on the tank base between each pair of bolt holes. Arse, should have let sleeping dogs lie..... Anyway once all the fumes had cleared I got to work with the hot air gun repeatedly warming and pulling the tank base back into shape until after about another two hours I could barely get a thin feeler gauge blade between the tank and a steel ruler. New seal in place, bolt the rebuilt pump back in and 'hand tightened' until it felt 'right'. Added a cup of fuel, left it 24 hours, no leaks! Added a gallon & repeated, no leaks, excellent. I'd been a bit dubious that a tank could be properly straightened this way but I think I've got away with it, more time will tell but hopefully it's a good ending. Interestingly I had been looking for some confirmed fuel resistant sealant just in case, couldn't find any manufacturer who would commit their product but I'm sure someone will know of something that works.
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Replies:
Posted By: Stevex
Date Posted: 23 Feb 2022 at 22:13
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The manual tells you to use Loctite 518 when installing a new flange o ring. I used aircraft fuel tank sealant although my tank didn't appear warped; just belt and braces as I didn't want to have to revisit the pump refit.
------------- People say I don't know Jack Sh1t; but I do, he lives next door. |
Posted By: Bladerunner919
Date Posted: 24 Feb 2022 at 09:04
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I've had my Mille tank off the bike all winter and I need to do exactly this before refitting it. It'd be good to lose the permanent smell of leaking petrol! |
Posted By: MikeyR
Date Posted: 25 Feb 2022 at 11:22
| SteveX, I com[letely missed the loctite 518 recommendation but good to know about effective products that are out there, cheers. |
Posted By: ajaycad
Date Posted: 27 Feb 2022 at 10:31
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I made the mistake of using black threebond, sealed the pump assembly fine however the excess on the inside of the flange o ring reacted with the fuel and clogged the tea bag filter !! Invested in Loctite 518 as recommended and made sure none ended up on the inside of the o ring...been fine ever since.
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