Ethanol Resistant Fuel Hose.

[curlylegend]

I'm looking for some advice here, please.  I'm replacing the fuel lines on my 1991 Yamaha TDM 850 so I need a couple of meters of 7mm i.d. 10mm o.d. ethanol resistant fuel hose, possibly Viton ?  All the reputable online suppliers only deal with lengths of 10 or 15 meters !  

AliExpress offer 2 meter lengths but can I trust it ?  It might just be cheap black rubber hose for all I know and will be leaking within a week or so .

Anybody had any experience in this area ?

[Tiggie]

ebay has a good selection and most seem to be from sellers who are running restoration or an automotive type business. Probably trust them a lot more than ali express 

[RideWithStyles]

Id go with Tiggies suggestion primarily.

there is one other sure fire way but I’ll have time to kill before commitment to your bike?why not do a test?  

Research the best you think will be correct.  Get jars or reuse cleaned jam jars make sure it’s got a good seal or do your own. Pour one with mostly with E10 and pop the pipe in and seal. The other with nothing but the air and seal as a control unit, leaving a third one just lying around the house/garage.
Leave over the winter months (but check and top up the e10 one if required. then before you wish to get you bike up and going in spring? Check the outer,9internal diameter and other aspect of the pipe e10compared to the controlled jar and garage one? No difference then you can be pretty sure it should be serviceable over spring and summer of that year at least regardless.

[Simon Davey]

I thought silicon hoses were resistant to just about anything?

It's food safe too, meaning it's resistant to acids on foods etc.

[AstronautNinja]

https://www.flexibleandfasteners.co.uk/Shop/flexible-rubber-fuel-line-petrol-diesel-hose-pipe/?srsltid=AfmBOoq8ewE2pHWtTmU2CTpspLY-eT_cwhnztdLyNeOPWXCvK324wRJi

[curlylegend]

47 minutes ago, RideWithStyles said:

Id go with Tiggies suggestion primarily.

there is one other sure fire way but I’ll have time to kill before commitment to your bike?why not do a test?  

Research the best you think will be correct.  Get jars or reuse cleaned jam jars make sure it’s got a good seal or do your own. Pour one with mostly with E10 and pop the pipe in and seal. The other with nothing but the air and seal as a control unit, leaving a third one just lying around the house/garage.
Leave over the winter months (but check and top up the e10 one if required. then before you wish to get you bike up and going in spring? Check the outer,9internal diameter and other aspect of the pipe e10compared to the controlled jar and garage one? No difference then you can be pretty sure it should be serviceable over spring and summer of that year at least regardless.

That's an excellent suggestion, thanks.  However I might go ahead and replace the fuel lines when I find something suitable over the winter. But I'll carry out your suggestion a month or so before I replace the lines on the bike. That way, if there's going to be a problem, I might have a months notice.

[curlylegend]

9 minutes ago, AstronautNinja said:

https://www.flexibleandfasteners.co.uk/Shop/flexible-rubber-fuel-line-petrol-diesel-hose-pipe/?srsltid=AfmBOoq8ewE2pHWtTmU2CTpspLY-eT_cwhnztdLyNeOPWXCvK324wRJi

That's the stuff I'm replacing , Nitrile rubber hose SAE 30R6 which although supposedly suitable for E10 fuel has only lasted 2 years before showing cracks on the outer surface.  What I'm looking for is SAE 30R9 quality stuff.

Thanks for the effort though.

[curlylegend]

1 hour ago, Simon Davey said:

I thought silicon hoses were resistant to just about anything?

It's food safe too, meaning it's resistant to acids on foods etc.

It would appear not to be suitable for petrol/ethanol due to permeability.  Pity, because it's great stuff for coolant hoses.

[AstronautNinja]

5 minutes ago, curlylegend said:

That's the stuff I'm replacing , Nitrile rubber hose SAE 30R6 which although supposedly suitable for E10 fuel has only lasted 2 years before showing cracks on the outer surface.  What I'm looking for is SAE 30R9 quality stuff.

Thanks for the effort though.

https://hilltop-products.co.uk/sae-j30-r9-fuel-line-injection-nitrile-rubber-hose-pipe-6-3-x-12-7mm.html?srsltid=AfmBOoquyV671MzzACmgkJnKbQbq8SzXuMH6A3gK9UaE1ZTGV9LDmgwN

[AstronautNinja]

https://www.demon-tweeks.com/uk/mocal-sae-j30-r9-high-pressure-rubber-fuel-hose-2008532/?srsltid=AfmBOopFrk7A-h5IOmIESHyIm7zpHn0troE1qrwpU6UKlilDXv_WIbBo

[Tinkicker]

42 minutes ago, curlylegend said:

That's the stuff I'm replacing , Nitrile rubber hose SAE 30R6 which although supposedly suitable for E10 fuel has only lasted 2 years before showing cracks on the outer surface.  What I'm looking for is SAE 30R9 quality stuff.

Thanks for the effort though.

 

 

Nitrile is good for fuel, but has poor performance for UV stability.  It should not be used in an environment involving direct sunlight.

[curlylegend]

52 minutes ago, Tinkicker said:

 

 

Nitrile is good for fuel, but has poor performance for UV stability.  It should not be used in an environment involving direct sunlight.

Exactly ! That's the dreadful situation I have to put up with here, lots and lots of warm sunshine !

That UV stuff is a pain in the arse.

[husoi]

12 minutes ago, curlylegend said:

Exactly ! That's the dreadful situation I have to put up with here, lots and lots of warm sunshine !

That UV stuff is a pain in the arse.

That's definitely a nonexistent problem in Scotland

[Bianco2564]

At work we use fuel hose made by Cohline, some of it is submerged in the tank, there are different specs but this seems to be suitable from a reputable supplier. It’s a bit bigger on the OD as it’s for fuel injection too but have a browse with the name Cohline see if anything else comes up

 

 https://www.dellorto.co.uk/shop/other-carburettor-injection-parts/fuel-injection-parts/injection-fuel-hose/2192-0613-cohline-carburettor-fuel-injection-hose-7mm-bore/

[curlylegend]

5 hours ago, husoi said:

That's definitely a nonexistent problem in Scotland

That's one of the reasons I left !

[RideWithStyles]

9 hours ago, Simon Davey said:

I thought silicon hoses were resistant to just about anything?

It's food safe too, meaning it's resistant to acids on foods etc.

Only if it’s properly chemically made and designed to do that correctly (with hygiene specific standards) from the start…, petrol and other chemicals for non living things consumption or contact is a totally different thing.

Edited September 20, 2024 by RideWithStyles

[iangaryprice]

I am followng this thread with interest. Ive had problems with the fuel line on my GSX600F. First time the line had a pin hole, just caught it before any serious probelm, hose was generally looking old alllover. Repalced it with hose I got off Ebay - advertised as suitable for E10. After 1 year it becaome so hard and stiff the fuel filter broke as I lifted the tank upt o disconnec the fuel/vacuum/drain/guage lines.

I have replaced it again, this hose is thicker O/D and reinforced. It was harder toy route because its stiffer.

There was an SAE number on it, I am goingot check if it end sin 6 or 9 as the thread above.

[husoi]

Not sure this helps

 

https://www.thehosemaster.co.uk/r9-unleaded-petrol-diesel-ethanol-automotive-fuel-hose

[husoi]

Or this one?

 

https://www.carbuilder.com/products/stainless-braided-ethanol-proof-fuel-hose-8mm-516?variant=41978485964854

[curlylegend]

1 hour ago, husoi said:

Not sure this helps

 

https://www.thehosemaster.co.uk/r9-unleaded-petrol-diesel-ethanol-automotive-fuel-hose

 

1 hour ago, husoi said:

Or this one?

 

https://www.carbuilder.com/products/stainless-braided-ethanol-proof-fuel-hose-8mm-516?variant=41978485964854

The problem I have is that the fuel line routing on my 1991 Yamaha TDM has to be very exact. Hoses with an O.D any bigger than standard are just about impossible to fit in the space allowed.

When I eventually get round to it I'll post up some pictures to show you what I mean.  

Some of the recommendations I've been given would have been perfect for most of the bikes I'd previously owned.

[curlylegend]

Thank you everyone who has replied to this topic.  

I think I have found a good solution to the problem but it's going to take a bit of time, thanks, Ride with styles !

I've obtained a length of what appears to be suitable fuel hose but I'm going to test a sample of it before I fit it. 

So have patience for a couple of months and I'll give a full account...with pictures !

[smallfrowne]

I haven't read anything apart from a few words of the headline but I was very impressed at the genuine Honda VFR750 replacement hoses which had the necessary bends already formed perfectly and for a few quid more than the pain of bending up a decent set of hoses of equivalent standing. It's a real murky business buying fuel hoses. I hate it. 

Edited January 18 by smallfrowne
Spg

[curlylegend]

Just a brief update, here's a picture of a sample of supposedly SAE 30R9 fuel hose steeping away in a sample of local E10 fuel. The rest of it has been left hanging outside to catch whatever sunshine we get to test for UV stability.

This has been a good idea from Ridewithstyles... thanks again !

I'll give it another few months and see what happens.

[RideWithStyles]

Thanks.

what I would do with a couple of weeks before yourll want to commit to using it is to take the e10 pipe out.
measure the internal, outer, length, firmness/squash and bend test and to see if any changes from the uv and control pieces.

 

if none leave it out in the air with the UV one for a week of two and test again especially the firmness/squash and bend test. This will test if its been chemically dried out which is where you get cracks and splits.

 

If all mint then at least you can say with good confidence it’s gonna last at least a year or two at least for little cost and loads of pipe to see the bike and the next one out.

 

[curlylegend]

22 hours ago, RideWithStyles said:

Thanks.

what I would do with a couple of weeks before yourll want to commit to using it is to take the e10 pipe out.
measure the internal, outer, length, firmness/squash and bend test and to see if any changes from the uv and control pieces.

 

if none leave it out in the air with the UV one for a week of two and test again especially the firmness/squash and bend test. This will test if its been chemically dried out which is where you get cracks and splits.

 

If all mint then at least you can say with good confidence it’s gonna last at least a year or two at least for little cost and loads of pipe to see the bike and the next one out.

 

I'll be doing just that !  Thanks for the advice.