Author Topic: Which fuel lines to buy and different types  (Read 288 times)

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Offline ColoradoMike

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Which fuel lines to buy and different types
« on: May 17, 2020, 04:40:54 pm »
Question: Which fuel lines should I use and where? What are the different sizes/types?

I am getting my carbs cleaned and replacing all fuel lines. There are also lots of tubes.. some clear, some black. Some black ones around the carbs, some black crossing over, some clear ones, and some clear ones around a fuel filter. What I thought would be easy is a bit tricky.

Which fuel lines should I use in the various places? I ordered Murph's clear Tygon lines. I also ordered any OEM tubes in that vicinity which includes these:

TUBE,7.3X12.5X400   $24.95
Part Number: 878211, 92190-1063

TUBE,3.5X6.5X420   $16.95
Part Number: 866039, 92059-1748

Any details and expertise is much appreciated!

Mike
2002 ZG1000 in restoration
2017 Triumph Thruxton R
and a sidecar with a dog sometimes

Offline Bud

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Re: Which fuel lines to buy and different types
« Reply #1 on: May 17, 2020, 07:48:48 pm »
The tygon hose kinks very easily after it warms up.  I used it on my silverwing and it kinked.  Made the engine starve for fuel.  Just be really careful where you use it.
2013 Kawasaki Concours 14
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Offline ColoradoMike

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Re: Which fuel lines to buy and different types
« Reply #2 on: May 17, 2020, 08:16:16 pm »
The tygon hose kinks very easily after it warms up.  I used it on my silverwing and it kinked.  Made the engine starve for fuel.  Just be really careful where you use it.

Any suggestions on non-Tygon hoses? I heard to not use automotive but haven't seen any others suggested.
2002 ZG1000 in restoration
2017 Triumph Thruxton R
and a sidecar with a dog sometimes

Offline Bud

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Re: Which fuel lines to buy and different types
« Reply #3 on: May 17, 2020, 08:32:17 pm »
Check the local bike shop and see what they have that isn't tygon.  I'm sure someone will chime in with some suggestions.
2013 Kawasaki Concours 14
2005 Kawasaki Concours
2001 Kawasaki Concours
1982 Suzuki GS1100GK
1983 Honda GL650I SilverWing

Offline DaveSz

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Re: Which fuel lines to buy and different types
« Reply #4 on: May 18, 2020, 01:16:05 am »
Right after I got my C10, I started using polyurethane fuel line between the petcock and an inline filter.  Is really durable, but stays soft and pliable, and as others have noted, kinking is a common issue when it gets warm, if you have bends in your tubing, which I do.   I'm using a straight in-line filter, with metal shell and tubes.  90 deg to the petcock outlet. 

Not sure where I first saw it done, but a dependable solution to kinking in a flexible 5/16 " fuel line is just to slip a light 1/4" diameter spring inside the fuel line where it is bending.  Stretched out a bit.  The spring doesn't bother the polyurethane, as it is indeed tough stuff.  Can't kink it if you try. 

Haven't tried Murph's Tygon line yet.

DaveSz
DaveSz
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Offline DC Concours

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Re: Which fuel lines to buy and different types
« Reply #5 on: May 18, 2020, 02:58:52 am »
Consider OEM Fuel lines.

Offline Bob_C_CT

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Re: Which fuel lines to buy and different types
« Reply #6 on: May 18, 2020, 08:31:40 am »
When you say a lot of tubes, there are 2 clear tubes that are probably yellowed up a bit that are on the carbs and point to the back of the bike that are about 10" long those are vent tubes and don't need to be replaced, they route through the frame and drop around the battery box.

A quick search of those part#s and I think you also bought the OEM fuel line too, besides Murphs.

The fuel supply line goes from the petcock with enough length to make a bend to make a straight run to the top of the carb bank, put a NAPA brand model 3006 right angled fuel filter to make the turn down to the carb and a length of the fuel line from the filter to the carb inlet. ( do yourself a favor and attach the whole length of the fuel line to the carbs before installing the carbs, so you don't have to reach down between the carbs to try and attach and tighten that fuel line after carb install) Some people have reported problems with gas flow using an inline filter but I never did and I don't trust the anemic filter in the tank on the petcock that only gets changed every 7 years or so when you change out the petcock.

There are 4 vacuum inlets, one on each carb, two of them get a line that connects them to each other, one gets capped or you can use a small length of that line and put a bolt that fits in the line snugly and the head of the bolt acts as a cap so the bolt can't pass through the line, if you don't have a vacuum cap and the last carb vacuum inlet uses a length of line to the petcock inlet to open the petcock fuel flow when vacuum is applied. I would have to take my tank off or search here to see which lines go to which carbs but it isn't real important as long as each vacuum inlet is attached to a line with no leaks. Link below, 1 and 4 carb connected, 2 goes to petcock and 3 is capped. Carb numbering left to right while sitting on the bike.
http://forum.cog-online.org/concours-c10-zg1000-general-chat-and-tech/vacuum-lines-on-carbs/

I don't know of any other soft lines off the top of my head that you have going to or from the carbs.
« Last Edit: May 18, 2020, 01:47:24 pm by Bob_C_CT »
Southern Connecticut.
97 C10,ZRX Front, Meanstreak rim

Offline cra-z1000

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Re: Which fuel lines to buy and different types
« Reply #7 on: May 18, 2020, 10:02:08 am »
I used Gates Barricade last time . So far so good . My bike had the Tygon line when I bought it and kinked badly .
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Offline loco wally

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Re: Which fuel lines to buy and different types
« Reply #8 on: May 24, 2020, 12:33:48 am »
Team,  I in the process of installing the beautiful Pingell petcock and new gas line from them.  I am trying to install the line without removing the carbs. I pulled two air pods in the through the airbox to give more room to attempt to install the fuel line. I can get it started on the line and using very very long nose pliers give no relief.  Do the carbs need to come off? Or wrap my hands tightly with duct tape and hope to get my hand in there.  Helpless in Seattle!!!

Offline Bud

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Re: Which fuel lines to buy and different types
« Reply #9 on: May 24, 2020, 09:41:57 am »
Get a long rod or screwdriver that will fit inside the nipple on the carbs and use that as a guide.  Lube the hose and nipple.  Having the rod inside allows you to push on the hose better.  HTH
2013 Kawasaki Concours 14
2005 Kawasaki Concours
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1983 Honda GL650I SilverWing

Offline loco wally

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Re: Which fuel lines to buy and different types
« Reply #10 on: May 25, 2020, 12:38:21 am »
Thanks. I have done that including lubing the line and the nipple. . I can get the fuel line stated on the nipple. But unable to pull it further on.  This is with the two left boots off and I can touch the fuel line.

Offline cra-z1000

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Re: Which fuel lines to buy and different types
« Reply #11 on: May 25, 2020, 02:14:13 am »
Long curved needlenose pliers help getting those on .
1987 C 10
80 Kawasaki KZ 1000 MK 2
74 Honda 750 four ss
73 Suzuki 550 triple
72 Honda 550 four