getting more fuel in the tank?

[sinto]

Hi, just wondering if someone can point me in the right direction....
I read somewhere that you can drill a hole in the neck tube of the petrol tank thus, allowing you to put more fuel in the tank, does anyone have any info on this or can point me where to go to get it?
Thanks in advance,
Colin

[ChristoT]

What source? Curious to see who advocates holes in tanks!  Anyway, isn't that what breathers are for?

On my old Fazer, I used to roll the bike gently from side to side to "slosh" the fuel when filling. Did an OK job at getting the air out, I could always overfill the tank. That said, I filled while sitting on the bike - my logic being that's how the bike sits most of the time on the road.

[sinto]

What source? Curious to see who advocates holes in tanks!  Anyway, isn't that what breathers are for?

On my old Fazer, I used to roll the bike gently from side to side to "slosh" the fuel when filling. Did an OK job at getting the air out, I could always overfill the tank. That said, I filled while sitting on the bike - my logic being that's how the bike sits most of the time on the road.

No Chris, not drilling a hole in the tank, I'm merely asking about drilling a hole inside the neck on the filler, it should make the escape of air easier as you fill the tank, as from what I gather, when you fill to the bottom of that tube, there is still room for about another couple of litres, but to fill it 'sloshing' about as you put it takes ages, this was done on bikes before I'm sure, although I'd never done it.
But I'm sure I read it somewhere on the old yuku site, I've tried searching but not getting anywhere fast :-(

[Paulfzs]

where abouts would said hole be?
images ?

[ChristoT]

What source? Curious to see who advocates holes in tanks!  Anyway, isn't that what breathers are for?

On my old Fazer, I used to roll the bike gently from side to side to "slosh" the fuel when filling. Did an OK job at getting the air out, I could always overfill the tank. That said, I filled while sitting on the bike - my logic being that's how the bike sits most of the time on the road.

No Chris, not drilling a hole in the tank, I'm merely asking about drilling a hole inside the neck on the filler, it should make the escape of air easier as you fill the tank, as from what I gather, when you fill to the bottom of that tube, there is still room for about another couple of litres, but to fill it 'sloshing' about as you put it takes ages, this was done on bikes before I'm sure, although I'd never done it.
But I'm sure I read it somewhere on the old yuku site, I've tried searching but not getting anywhere fast :-(

Is it in the tank? Yes.
Are you advocating drilling a hole? Yes.

Therefore a hole in your tank. 

I understood ya first time. However, I wouldn't want to have a drill near petrol fumes - nor swarf going into my tank! 

[sinto]

Paul, I can't give you pics as I've not done it, I'm trying to find out about as well as was just something I got in my head, mind you, it's fairly empty most of the time ;-)

[midden]

Think sinto607276 is suggesting a hole drilled at top of filler tube (higher the better) freeing the possible air trap  and thus allowing more fuel. 
2 thoughts on this
1. I imagine you'd then have to block the overflow pipes
2. What's the gain, a few extra miles before having to remove your helmet.  Whoo   

better to carry a jerry can

[fazersharp]

1. I imagine you'd then have to block the overflow pipes

Thats what I was thinking, it would just piss out unless you rode bolt upright for x amount of miles. 

[sinto]

Think sinto607276 is suggesting a hole drilled at top of filler tube (higher the better) freeing the possible air trap  and thus allowing more fuel. 
2 thoughts on this
1. I imagine you'd then have to block the overflow pipes
2. What's the gain, a few extra miles before having to remove your helmet.  Whoo   

better to carry a jerry can

Yes midden, that is my thoughts and eventually found it on old site!
Was posted by 'gnasher' but can't seem to paste it here :-(

[sinto]

by Gnasher
Nov 25 05 8:13 PM

Re: breather mod

You CANT remove the filler neck, however as you rightly worked out it's only the length that's different.

If you look on the right hand side of the neck about 25mm down, you will see a very small bleed hole. All you need do is enlarge this hole, to about 8mm, DONT what ever you do use an electric drill or the hot swarf could well ignite the fuel .

Get hold of a large cocktail umbrella lengthen the stick, pop it in the filler neck, open it and secure it so as to catch the swarf.

Use a HAND drill and go up in drill sizes until you can get it to at least 7mm, drill remove the umbrella, dont worry if any drop in they will just sink to the bottom and do nothing.

Job done

All you do now is fill the tank to this bleed hole, the bigger the hole the faster the fill.

[sinto]

There you go, got it done, originally from 2005 so quite a while back :-(

[sinto]

Whole thread is under 'Cutting the Fuel Filler Neck down' in the mods, mods and more mods in the old yuku site if you want to read  the whole tread on it.

[Paulfzs]

Whole thread is under 'Cutting the Fuel Filler Neck down' in the mods, mods and more mods in the old yuku site if you want to read  the whole tread on it.

http://fazerowners.yuku.com/topic/6185/Cutting-the-Fuel-Filler-Neck-down#.VRndWfnF_8A

[sinto]

Cheers Paul, I can't do that as I use my phone and don't see the page link :-(

[Paulfzs]

still have no idea why this would help lol, maybe once i look at it ill see unless anyone has a pic of the inside of the tank

[ChristoT]

still have no idea why this would help lol, maybe once i look at it ill see unless anyone has a pic of the inside of the tank

The bigger the hole, the greater the airflow, the less time you sit at the pump waiting for the fuel level in the neck to go down.

[Paulfzs]

still have no idea why this would help lol, maybe once i look at it ill see unless anyone has a pic of the inside of the tank

The bigger the hole, the greater the airflow, the less time you sit at the pump waiting for the fuel level in the neck to go down.

ahh that makes sense so it doesnt allow more fuel so to speak it allows you to fill it faster...


so could just wait for it to settle

[ChristoT]

still have no idea why this would help lol, maybe once i look at it ill see unless anyone has a pic of the inside of the tank

The bigger the hole, the greater the airflow, the less time you sit at the pump waiting for the fuel level in the neck to go down.

ahh that makes sense so it doesnt allow more fuel so to speak it allows you to fill it faster...


so could just wait for it to settle

Precisely. Which is what I was on about with my slow "sloshing". Forces the air through a little faster.

[Paulfzs]

still have no idea why this would help lol, maybe once i look at it ill see unless anyone has a pic of the inside of the tank

The bigger the hole, the greater the airflow, the less time you sit at the pump waiting for the fuel level in the neck to go down.

ahh that makes sense so it doesnt allow more fuel so to speak it allows you to fill it faster...


so could just wait for it to settle

Precisely. Which is what I was on about with my slow "sloshing". Forces the air through a little faster.

ahh cool, learn something new every day!


might electric drill mine when i have the tank emptied as i need the fuel sender out

[sinto]

WARNING WARNING WARNING
Well mind and vent your tank really well or have a fire extinguisher real handy as it's the petrol vapours that burns and not the actual liquid, vapours will still be present for ages after emptying your tank of fuel.

[Paulfzs]

yeah i know that one! when i was younger i took a match to an empty petrol can, was like a jet engine cooked my thumb lol, skin fell off like chicken.

[limax2]

WARNING WARNING WARNING
Well mind and vent your tank really well or have a fire extinguisher real handy as it's the petrol vapours that burns and not the actual liquid, vapours will still be present for ages after emptying your tank of fuel.

An old trick to do a quick tank repair at the race track was to run the van exhaust through the tank for a short while to clear the petrol vapours.

[Paulfzs]

WARNING WARNING WARNING
Well mind and vent your tank really well or have a fire extinguisher real handy as it's the petrol vapours that burns and not the actual liquid, vapours will still be present for ages after emptying your tank of fuel.

An old trick to do a quick tank repair at the race track was to run the van exhaust through the tank for a short while to clear the petrol vapours.

^^ works well

[slimwilly]

The aim of this project seems to be to lessen the air expansion gap kept at the top of the tank,,the one problem you could encounter is fuel expansion from heat,sunshine, so if you fill tank to top ,,then get riding to use the expansion amount before it go's through the overflow.

[Pal]

This is the biggest bugbear with my Fazer, I can spend about five minutes waiting for the bubbles so I can squeeze another litre or two in.

I thought of carrying a little S shaped tube to vent the top of the tank when filling up.