Gas lines

[sermn8ter]

I know this probably belongs on another forum, and I did look to see if I saw anything on the tech forums but I didn't, so I have a question, and if it needs to be moved off, please do so. Here goes.


My gas lines are old, dry rotted, and leaky, which creates performance issues obviously. I have trimmed and moved about all I can.

Is there one type of replacement hose that should be used to replace these with?

Do they have to be a certain length, beyond being able to reach the carb to supply gas. With the old hoses I believe I had a couple that were a bit long and they had a tendency to kink. They may been due to age, but it caused gas starvation to the carbs which of course means you don't go, or at least not very well. Maybe the new hose is stiffer and won't kink.

Are there any other issues to be considered when replacing them?

Clear or dark line? Does it matter?

Thanks guys.

(I tried to move it to the technical discussion board, but it was too late by the time I realized where I was at, and I didn't have permission to move it. Sorry.)

<<Done - not a problem KT >>

[Pat Kelly]

I use 1/4" ID automotive fuel hose. Mine are long enough to raise the tank up 6" or so.
The vacuum lines are 3/16" ID.

On my standard I routed from the right petcock to the left carbs and left petcock to the right carbs. This helped avoid kinks.

On my special I routed the left to the right petcocks and moved the two 'T's into this line. I then went from the 'T's to the two carb nipples. I blocked the nipple on the petcocks that were for the 'prime' position. I then removed the 'octopus diaphram assembly'

[TopCatGr58]

Hey Ron,

I got my 1/4" ID hose from the local Yamaha Shop, it was opaque grey, silicone type rubber, they haven't hardened in several years now. Other recommend the Polyurethane, comes in clear, and many colors, and you can see the fuel flowing. You can get it from DK. Some of the auto hose I've seen is double walled, and quite stiff due to this thickness, but not sure what style Pat found?! Also, the thicker ones are harder to put the clamps around and have much room for them! When the hoses are stiff, they are more likely to kink! But routing them like Pat said helps to reduce the angle of bend and thereby reduce the kinking!
T.C.

[GNEPIG]

.. and don't for get to include a set of small aero shaped inline fuel filters, you know the ones with the brass center, and make sure you point the small end towards the fuel valve
these are also clear so you can see what floats around in your fuel tank

[Douce]

Find a small engine repair shop.
and buy some tygon
Expensive but worth it.
Douce

[81XS11LadyRider]

You can order the Gray Tygon Fuel line in 5' rolls from Dennis Kirk. I placed an order and got it in 2 days. 1/4" ID X 5' is $13.99 and the part number is 18-0593.

Originally posted by Douce
Find a small engine repair shop.
and buy some tygon
Expensive but worth it.
Douce