Post Posted: Mon Sep 24, 2007 3:30 pm
 Subject: Vinyl tubing as fuel line?

If you saw my other thread, in addition to my petcock crapping out, my fuel filter was broken. I'm about 96% positive that it's because of the short fuel lines and bends and twists for all that to fit between the carbs and the petcock.

So, my question is this: Can I use the stock fuel line between petcock and filter (about 2.5" worth) then use a longer piece of vinyl tubing to gently curve and/or loop about from the filter to the carbs? That way there's no stress on the hard parts of the filter. Will I have trouble with the gravity feed? Will the fuel react poorly with the vinyl tubing?

Post Posted: Mon Sep 24, 2007 3:32 pm
 Subject: Make sure it is gas friendly

If it isn't it will melt in a 20-30seconds and make a horrendous mess... don't ask.
Post Posted: Mon Sep 24, 2007 3:40 pm
 Subject: Re: Make sure it is gas friendly


To test, should I just drip some gasoline into a sample line and see what happens?

Do you know if the gravity feed will get fuel through a loop?

See illustration below: Smile

fuel _line_route.jpg
Post Posted: Mon Sep 24, 2007 3:47 pm
 Subject: put some gas in a pop-can (drain the float bowls)

put a bit of pipe into the gas and if it gets sticky/melts you have your answer...

If it didn't say gas-line I'm guessing it isn't gas line. It is cheap stuff to buy, so my recommendation is to go buy a few feet of the real deal. Nice to have spare for carb cleaning and bowl draining anyhow.

As for the routing you propose - I'd be tempted to cut fuel line so that you don't have that loop... it is a potential air trap. May as well get it to work without rigging it.
Post Posted: Mon Sep 24, 2007 3:59 pm
 Subject: Re: put some gas in a pop-can (drain the float bowls)

Well, after some searching, I found a couple threads recommending against plain vinyl tubing and instead recommending Tygon.

I have a piece of tubing soaking in a jar as we speak, just for shits and giggles though... heh

The hole idea of this setup would be the loop to take stress off the filter... haha, so maybe I'll just try and think of some other way to arrange the filter so that it's not as stressed...

If I want a longer piece of fuel line to play with, which tube on my tank can I cut some of the end off of? (california bike)

Post Posted: Mon Sep 24, 2007 4:10 pm
 Subject: Read the hose. I mean it...

if it's meant to be used as fuel hose, it'll say so right on it.

Tractor Supply generally stocks several sizes of fuel grade clear hose, and it's in bulk so you don't have to buy 10 ft when you only need 2.
Post Posted: Mon Sep 24, 2007 4:11 pm
 Subject: have you looked/read here?


This is how you can install a fuel filter & line with no 'kink' issues. The key is to use the correct length of tubing.
Post Posted: Mon Sep 24, 2007 5:02 pm
 Subject: Re: have you looked/read here?

Yes, I have read that, and I don't have any kinks in the line or anything... There is just pressure on the filter. Maybe it was even a faulty filter... I'll just hook it back up the way it was and see if it breaks another filter. If it does, I'll get some new fuel line and try again... Smile

Post Posted: Mon Sep 24, 2007 5:04 pm
 Subject: Re: Read the hose. I mean it...

I got mine at a local hardware store and it's definitely not meant for fuel... and it doesn't say anywhere on the tubing itself that it is either.

So, good to know...

Post Posted: Mon Sep 24, 2007 7:46 pm
 Subject: Fuel filter

I am using an after-market filter I purchased at the motorcycle shop; it is only 5/8" long (not counting the ends that the hose fits on) so you don't have so much length to deal with - it was only $3 . From petcock to filter, I have a 3" piece of regular 1/4" I.D. fuel line and from the filter to the carb, it is about 2-1/4". I used hose clamps to fasten the fuel filter (don't tighten too hard since the ends are only plastic). This has worked very well. If you don't want to cut the stock line, you can buy 1/4" I.D. fuel line at most automotive supply stores.

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