Fuel Line

The Euro specs for fuel line have recently been upgraded to I think RK09 which is a viton lined permeatation resistant hose and it should be marked externally with the spec

our current unleaded fuel slowly eats its way through the old spec hoses and has been the cause of lots of vehicle fires ( if your fuel hoses show any signs of external moisture change them )

Paying a few extra bucks for Viton lined hose makes sense

I used green Tygon but it only lasted for four years. It crumbled while I was at work so I ran to the local auto parts store and got the $3 clear lawn mower line. It's gotten me through the summer thus far. Much easier than mail ordering Tygon especially as much as I ride my Noton.

TYGON BEWARE- Make sure you use the right grade of Tygon. I bought some from a motorcycle parts distributor on line and it was listed as fuel line. I installed it on my bike and happened to go out to the garage a few hours later and smelled gas. The lines had basically melted into goo. It was clear tygon marked as 2375 grade. We do have a lot of ethanol in the gas up here as well.

I used these to complete a new line:

http://www.mcmaster.com/#5349k42/=thcmm1

I made a crimper by drilling the threads out of a 7/16" grade 8 nut, cutting it in half through the corners of the hex so as to leave the flats unmolested, and squeezing it with a vise.

I then must have tossed the remaining 44 out with the trash as I can't find them. It sucks getting old but it beats a dirt nap.

Old Britts has the correct ferrules and also clear line by the foot, I don't know what it is, but it's been on my bike for over 3 years now and it looks fine. It did turn blue inside from the avgas. The price is right too, I'm sure they'll ship overseas.

I used a Rigid flaring tool I happened to have around.

Dave

BillT said:

DogT said:

I used the clear line from Old Britts, crimped the brass ferrules on with a flaring tool. Looks like original without being hard and yellow and it's 3-4 years old by now. Taken on a blue tint inside from the avgas. Kinda matches the bike. I did finally got some 180 deg banjos and got rid of the H style harness though.

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An advantage of the 180 deg banjos is it also keeps the fuel lines a little further away from the cylinders - less chance of boiling the line dry when you stop a hot engine.

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Yes! I agree with BillT. The fact that you could cook the H style harness if the head gasket ever let go near the rear of the cylinder area. Not a problem with copper gaskets but with the composite gasket, it may happen. Latter 850's did away with the H Style and went to the 180-degree banjo fittings, which fits behind the carburetors as stated.
Thomas.
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