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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modern fuels (additives)?
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<blockquote data-quote="vince998" data-source="post: 17319" data-attributes="member: 261"><p>Has any body else noticed how agressive the modern petrol is getting (and how much it stinks)?</p><p></p><p>I´ve developed a fuel leak at the rear of the tank (the weld sealing the back of the tunnel up).</p><p></p><p>On cleaning up and sanding back, it turns out to be a porous weld that has always been there (and probably only been sealed by the enamel or paint) but the fuel has dissolved the paint (2 pack repainted about 8 years ago) over a large area into a soft pulp.</p><p></p><p>I´m not sure how long this has been developing as i can´t remember the last time i looked at the bottom of the tank.</p><p></p><p>I´ve noticed on my old supply of fuel lines (unused but from the 80s) that after a short period of use, they lose all stability.</p><p></p><p>Even Amal are now offering new floats for MKI concentrics made out of some type of military un-burstable, unsinkable material (and at last adjustable so no more tapping float needle seats in and out to obtain the correct fuel level <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite11" alt=":rolleyes:" title="Roll Eyes :rolleyes:" loading="lazy" data-shortname=":rolleyes:" />)</p><p></p><p>Even the paint in the top portion of my filler neck (forgot to tell the painters to mask it up) has just recently started to soften and peel off/fall into the tank, yet for the last 8 years it has been O.K?</p><p></p><p>Looking inside the tank, i´ve only got a light covering of surface rust, but i´m givng my tank to a guy down the road for internal coating tommorow (before any other nasties surface)</p><p>He uses a 2 component flexible material swished (or is that swooshed) around the inside of the tank (after de-rusting/cleaning) that is also resistant to modern fuels.</p><p>Apparently there are a lot of tank sealing products on the market (used over the last 10 years or so) that aren´t resistant to modern fuels, so maybe worth a look if you´ve already been there and done that.</p></blockquote><p></p>
[QUOTE="vince998, post: 17319, member: 261"] Has any body else noticed how agressive the modern petrol is getting (and how much it stinks)? I´ve developed a fuel leak at the rear of the tank (the weld sealing the back of the tunnel up). On cleaning up and sanding back, it turns out to be a porous weld that has always been there (and probably only been sealed by the enamel or paint) but the fuel has dissolved the paint (2 pack repainted about 8 years ago) over a large area into a soft pulp. I´m not sure how long this has been developing as i can´t remember the last time i looked at the bottom of the tank. I´ve noticed on my old supply of fuel lines (unused but from the 80s) that after a short period of use, they lose all stability. Even Amal are now offering new floats for MKI concentrics made out of some type of military un-burstable, unsinkable material (and at last adjustable so no more tapping float needle seats in and out to obtain the correct fuel level :rolleyes:) Even the paint in the top portion of my filler neck (forgot to tell the painters to mask it up) has just recently started to soften and peel off/fall into the tank, yet for the last 8 years it has been O.K? Looking inside the tank, i´ve only got a light covering of surface rust, but i´m givng my tank to a guy down the road for internal coating tommorow (before any other nasties surface) He uses a 2 component flexible material swished (or is that swooshed) around the inside of the tank (after de-rusting/cleaning) that is also resistant to modern fuels. Apparently there are a lot of tank sealing products on the market (used over the last 10 years or so) that aren´t resistant to modern fuels, so maybe worth a look if you´ve already been there and done that. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modern fuels (additives)?
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