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Fuel hose, clear plastic or black rubber #761106 01/01/19 7:53 am
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Was there a year when BSA changed from black rubber to clear plastic if indeed they did it at all? What about Triumph?
Sid

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Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761131 01/01/19 2:59 pm
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A sales brochure for 1953 shows black rubber, one from 1955 shows clear plastic.

I do not have a brochure for 1954, so if one of you guys has one, the answer may be in the pictures in that one.

Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761215 01/02/19 4:09 am
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Most if not all BSA's I have seen have black fuel line and Triumph mostly used clear fuel line.

Ferrule crimping styles are also different between the two and fuel sizes (ID & OD)


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Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761285 01/02/19 8:29 pm
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gunner Online Content
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Unless you are really keen with originality, I would use Tygon fuel hose, which despite being a translucent yellow colour, appears to remain flexible for years, doesn't turn brown and become brittle.


1968 A65 Firebird
1967 B44 Shooting Star
1972 Norton Commando
Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761290 01/02/19 9:01 pm
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Both black rubber and clear plastic are unsuitable for fuel hose long term. The petrol rots the rubber which then blocks the carb. Petrol hardens plastic hose causing leaks at the fittings.
The black synthetic rubber used on Japanese bikes lasts well as does the yellowish Tygon hose


BSA B31 500 "Stargazer"
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Greeves 350
Greeves 360
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Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761304 01/02/19 10:42 pm
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Fuel lines last about 5 years tops for me, thats the black rubber stuff, it starts to crack on bends eventually. Especially where UV gets it. Never tried the dayglo stuff. Sounds great.
Havent used clear stuff for years , it gets too brittle.

Last edited by gavin eisler; 01/02/19 10:45 pm.

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
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Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761314 01/02/19 11:35 pm
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I use clear thickwalled polyurethane made for ultralight aircraft stays flexible for a very long time
https://www.air-techinc.com/maingroups.php?pmid=12


1972 Triumph T120
1968 BSA A65
1968 MGB Roadster
1979 Chevrolet Camaro Berlinetta
1969 Honda Mini Trail
1939 farmall f30 tractor
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b
1972 Norton commando
2 olive drab WWII military bicycle replicas
Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761317 01/03/19 12:47 am
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What's the consensus on black fuel line when you don't have to buy ethanal fuel? In these parts, we have more than one choice of non ethanal including Chevron 94 and haven't had a problem yet.

Cheers, Wilf


"It's about the ride..."
Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761323 01/03/19 1:35 am
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I've been using plain ol' double-walled automotive fuel hose for around 40 years, and I've never noticed any swarf in the float bowls (and I run Mikunis, which have no inlet screens).

But, I change hose frequently, I'd say every 1-2 years. At $.35 per foot at the auto supply store, why not?

BTW, if you don't like the writing on the hose, a little acetone or alcohol will take it off.




Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761326 01/03/19 1:48 am
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I like Clear. Superthane TM is the best.


Down to 1 BSA, 2 Triumphs, 1 '56 Chevy
1 '65 XLCH on the way to Japan!
Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761502 01/04/19 6:19 pm
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+1 clear. You can SEE it tickling (or not).



"Don't trust your eyes if your imagination is out of focus." - Mark Twain
Re: Fuel hose, clear plastic or black rubber [Re: gunner] #761584 01/05/19 4:08 am
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Originally Posted by gunner
Unless you are really keen with originality, I would use Tygon fuel hose, which despite being a translucent yellow colour, appears to remain flexible for years, doesn't turn brown and become brittle.


That's interesting. We use Tygon for oil compensated lines on the deep water ROVs. They get exposed to plenty of UV on the back deck of the ship and massive pressure at thousands of meters depth, but I've never seen one give out.


Josh
Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761587 01/05/19 4:31 am
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Josh, where would one acquire Tygon hose? And, what is an ROV?


Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761596 01/05/19 6:18 am
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Remote Operated Vehicle" used to get oil, cheaper than divers.


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Cagiva Raptor 650
MZ TS 250
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Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761607 01/05/19 10:34 am
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You can buy Tygon tubing on eBay, Amazon etc.

There are various formulations around but the one you want is the yellow petrol resistant type, should be marked F4040A, see .This Link from the manufacturers website.

Watch out for fake Chinese copies.


1968 A65 Firebird
1967 B44 Shooting Star
1972 Norton Commando
Re: Fuel hose, clear plastic or black rubber [Re: Wilfred] #761718 01/06/19 6:26 am
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Originally Posted by Wilfred
What's the consensus on black fuel line when you don't have to buy ethanal fuel? In these parts, we have more than one choice of non ethanal including Chevron 94 and haven't had a problem yet.

Cheers, Wilf


UV light attacks everything and causes them to degrade, people included.
Keep your bike out of the sun & the fuel line will remain soft for a very long time.
Heat also does the same thing
So never ride your bike and the black rubber fuel lines will remain soft for a very long time.

There are many different grades of black rubber fuel line.
The best is a double layer one with butyl ( petrol proof ) rubber inner sleeve and a neoprene ( oil resistant ) rubber outer sleeve.
These come fiberglass reinforced, steel reinforced , stainless steel reinforced & I have just seen some kevlar reinforced ones.
The strongest are the fuel injected hoses.

As such a lot of fuel line can crack on the outside & not leak.
Then there are single wall rubber fuel lines, the best are Bunya-n rubber but the down side of them is when they start to crack on the outside the crack will go all the way through.

While it is a PIA to replace them, only properly spiral wound, full soft copper fuel lines are permanent so everything else should be considered a service replacement part.

Tygon, made by St Gomain in the USA is the yellow coloured fuel line.
They also make a clear , a grey & a blue fuel line.
The tygon is a single wall tube so when it starts to crack it must be replaced.
Tygon s very expensive & as already mentioned will have the manufacturers code as a continious line for the full length of the tube.

I fix lawnmowers & get a lot of spam selling unbranded fuel line in the "Popular yellow colour"
Most of this is gelatin based plastic and will dissinergrate while you are riding.
A lot of cheap Chinese chain saws come fitted with it as standard and they all fall apart within a year or so.
many stories about exploding shainsaws & line trimmers from this line leaking and then the tool bursting into flames.

Genuine Tygon is expensive.
If it is not expensive then it is not Tygon

Some BSA's came fitted with plain old PVC which will also work, but goes hard in a few years thus requiring regular replacement.

It is your bike so you decide what you want to fit, just remember no matter what you use it WILL HAVE TO BE REPLACED at some regular interval.
The cheaper the tubing the more often you will need to replace it.


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Trevor
Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761719 01/06/19 11:25 am
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I recommend against copper fuel line. It breaks.

I have good success with black rubber hose sold as car fuel injection hose.


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Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761734 01/06/19 2:50 pm
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Yes. Copper "work hardens" with vibration and then breaks.

A loop turned someplace along the copper line can act as a "spring" to prevent this, IF there is room for such a loop.
Old knucklehead and flathead Harleys had just such a loop in the fuel line for this reason.

Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761741 01/06/19 3:57 pm
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I wouldn’t be at all surprised if coiling the pipe helps.

I doubt that it helps enough.

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Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761744 01/06/19 4:18 pm
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a better use for coiled copper
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1972 Triumph T120
1968 BSA A65
1968 MGB Roadster
1979 Chevrolet Camaro Berlinetta
1969 Honda Mini Trail
1939 farmall f30 tractor
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b
1972 Norton commando
2 olive drab WWII military bicycle replicas
Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761787 01/07/19 12:53 am
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Ever wonder why copper is not used on brake lines?

Re: Fuel hose, clear plastic or black rubber [Re: garbln] #761802 01/07/19 6:40 am
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Originally Posted by garbln
Ever wonder why copper is not used on brake lines?


Nope.

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Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761846 01/07/19 8:46 pm
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Wow I didn't know they used it for brakes anymore. I thought it was illegal at least on this side of the pond. With vibration copper work hardens and breaks, at least that's what a couple of brake shops told me. But what do I know I'm just a backyard mechanic and I've never had to replace brake lines.

Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761849 01/07/19 8:59 pm
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The so called copper brake pipes are not copper but copper/nickle alloy.
Stamping on the brake pedal can produce brake line pressures of over 2000psi, copper would not stand a chance


BSA B31 500 "Stargazer"
Greeves 200 "Blue Meanie"
Greeves 350
Greeves 360
Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500 sprint/LSR bike "Deofol"
Jawa 500 "Llareggub"
Aprilia RSV Mille "Lo Stregone"
'35 & '36 OK Supreme
Kawasaki ZZR1400 "Kuro no senshi"
Re: Fuel hose, clear plastic or black rubber [Re: SidSnot] #761851 01/07/19 9:30 pm
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It’s still as ductile as copper.

It’s far superior to what the manufactures use on cars which is steel pipe with some kind of coating on there. When that stuff corrodes it’s pretty frightening, snaps like a weak twig when replacing the lines if its bad enough.


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