Fuel lines leaking

de crowe · Dec 29, 2021

What are the recommended replacement fuel lines ? For my R80 GS 1991. I see on one of the forums that some people use a yellow Tygon fuel lines?
What do you guys recommend? Thanks in advance and safe riding for the new year

Sent from my iPhone using Tapatalk

Tbolt · Dec 29, 2021

Look at the moto-bins options.

SteveHop · Dec 29, 2021

Tbolt said:
Look at the moto-bins options.

I see that motorworks are offering a E10 compatable fuel hose . But the inside diameter is only 5.5mm which seems a bit small ? The original spec was 7mm diameter.

SteveHop · Dec 29, 2021

Ive been looking to change the hoses on my bikes and have found some information regarding ethenol compatability.

These are the SAE J30 specifications for ethenol friendly fuel pipes, so we need eiyjer R9 or R14 grades.

The SAE J30 R9 is a high pressure hose that is readily available but because it is a high pressure hose the 7mm will have an outside diameter of 12,5mm which may prove a bit difficalt for the crossover pipe.

The SAE J30 R14 is a low pressure hose so it should have a thinner wall section then the R9 but it doesn't seem readily available.

Im picking up some of the R9 in a day or so and will let you know how i get on.

Mongolian Explorer · Dec 29, 2021

Motorworks is your friend

SteveHop · Dec 29, 2021

Mongolian Explorer said:
Motorworks is your friend

5.5mm inside diameter . a bit small ?

Gelandestrasse · Dec 29, 2021

I've used this recently with no ill effects: https://www.ebay.co.uk/itm/203592202171

1 metre is plenty for a complete overhaul. I haven't needed to use jubilee clips but always watching for leaks/smelly boots.

dogshome · Dec 30, 2021

Using tygon here, only because of success for several years in RC aircraft. It is fine for Ethanol. Downside is it is clear yellow, they do black but not easily obtainable. You can see any stuff or water in the line, but it looks out of place on the bike. It does go hard after a few years as well.

That eBay stuff looks good. But R6 is slightly bulky. Motorworks doubtless ideal, plus ID and OD and with their proper clips will all fit as per original. I would choose that next time.

R9 Fuel injection pipe does not stretch and impossible to fit cold and very bulky. I got a piece initially and failed with it.

Redboots · Dec 30, 2021

Ariete - ariete-fuel-pipes/ The 8mm version. Think its 8outer, 6 inner.
Used it for years. No clips needed.

de crowe · Dec 30, 2021

Thanks for all the good advice. I will let you know how I get on.

Steptoe · Dec 30, 2021

Any half decent car spares shop should have a large selection fuel hose.
And a lot cheaper than the very same hose sold at bmw parts suppliers.

SteveHop · Dec 30, 2021

dogshome said:
Using tygon here, only because of success for several years in RC aircraft. It is fine for Ethanol. Downside is it is clear yellow, they do black but not easily obtainable. You can see any stuff or water in the line, but it looks out of place on the bike. It does go hard after a few years as well.

That eBay stuff looks good. But R6 is slightly bulky. Motorworks doubtless ideal, plus ID and OD and with their proper clips will all fit as per original. I would choose that next time.

R9 Fuel injection pipe does not stretch and impossible to fit cold and very bulky. I got a piece initially and failed with it.

Have you fitted the motorworks stuff ?

scooter paul · Dec 30, 2021

I

SteveHop said:
Have you fitted the motorworks stuff ?

I use the Motor works fuel line. Good fit to the taps and junctions. Not too thick to pass under the airbox. Fuel hose from the auto factors tends to be too thick, at least from my local factor.

Steptoe · Dec 30, 2021

scooter paul said:
I
I use the Motor works fuel line. Good fit to the taps and junctions. Not too thick to pass under the airbox. Fuel hose from the auto factors tends to be too thick, at least from my local factor.

Mine has the identical hose used by BMW for about £4/£5 a metre

Motorworks don't make their own hose, they buy it in and add their mark-up.

Jockser · Dec 30, 2021

Steptoe said:
Any half decent car spares shop should have a large selection fuel hose.

That's exactly what I did. Brought a piece of the old pipe with me & they matched it exactly. Without the outer braid but that always seems to look untidy at the ends. Bought 2m, have done 3 bikes & still have nearly half of it left. Cheap as chips & easy to push on once the end is warmed in hot water, no leaks

bowser · Dec 30, 2021

Jockser said:
That's exactly what I did. Brought a piece of the old pipe with me & they matched it exactly. Without the outer braid but that always seems to look untidy at the ends. Bought 2m, have done 3 bikes & still have nearly half of it left. Cheap as chips & easy to push on once the end is warmed in hot water, no leaks

wifes hair dryer works to warm it as well, but for some reason she gets pissed as hell when I take it out to the garage to do stuff like that, sometimes they are really weird wives are !!!! totally unreasonable

Jockser · Dec 30, 2021

bowser said:
wifes hair dryer works to warm it as well, but for some reason she gets pissed as hell when I take it out to the garage to do stuff like that, sometimes they are really weird wives are !!!! totally unreasonable

Why d'ya think I use hot water

bowser · Dec 30, 2021

Jockser said:
Why d'ya think I use hot water

I am assuming because you are a natural coward

and not as fecking stupid as me? just a wild arse guess

dr nosh · Dec 30, 2021

Jockser said:
That's exactly what I did. Brought a piece of the old pipe with me & they matched it exactly. Without the outer braid but that always seems to look untidy at the ends. Bought 2m, have done 3 bikes & still have nearly half of it left. Cheap as chips & easy to push on once the end is warmed in hot water, no leaks

Car parts shop always a cheaper place to get fuel lines.

I always trim the braid a little short at the ends with a good pair of 'electronics grade' side cutters. Then add a short length of heat shrink sleeve at each end. Bobs yer Uncle.

Braided hose always looks better.

Beemerboff · Dec 31, 2021

The OEM BMW hose on the GS was actually marked BMW 6 MM X 11 MM and the date, in my case 3/93.
I replaced mine as a precaution around 10 years ago, stored a bit in E100 {meths, of Irish Whisky} and ten years later it still looks OK.
Auto high pressure fuel hose to the already Mentioned J30/ R9 in 6 mm dia is cheap and easy to find, gets a good grip an the fittings without clamps and the OD is around 11 mm so it fits under the airbox fine.

Fuel lines leaking

Well-known member

Well-known member

Well-known member

Well-known member

Attachments

Active member

Well-known member

Well-known member

Registered user

Member well-known

Well-known member

What a waste.

Well-known member

Well-known member

What a waste.

Well-known member

Well-known member

Well-known member

Well-known member

Well-known member

Registered user

Similar threads