Fuel Pipe

[brewsy]

All,
I had a search of the forum (I was sure somebody once said) for the ID of the fuel pipe that is used on the Hawk.

Anybody know?

Was thinking of getting some new pipe and some quick release connectors as well as the tool to do the frame up properly..

Marc

[Guzzisti57]

I used 8mm, was fine

[brewsy]

Cheers Guzzi.
Should have mentioned I'm in the USA and they use the good old fashioned 'English' (their term not mine!! ) system.

Using google to convert 8mm and closest is 5/16's.

Cheers,
Marc

[MrDude_1]

Cheers Guzzi.
Should have mentioned I'm in the USA and they use the good old fashioned 'English' (their term not mine!! ) system.

Using google to convert 8mm and closest is 5/16's.

Cheers,
Marc

yea... imperial instead of metric... i used 5/16" and 1/4" for mine... note there are two diffrent sizes in the system...

[LeftRightLeftThrottle]

Yes, i bought a 5' length of 1/4" to feed the carbs and a 5' length of 5/16" to feed the pump. There was a thread about this that linked to denniskirk.com I ordered the blue stuff. I haven't replaced it yet because
a.) its a bitch to get to the fuel pump
b.) I need smaller diameter hose clamps because the polypropelene hose has a smaller outside diameter than the stock rubber stuff
c.) there is a plastic thing in the stock line that feeds the carbs (not the big fuel filter) what is this? just a connector to separate the fuel line?

Anyone else have trouble getting their hands around the plumbing? Would it be easier to take of the tire and inner fender?

[mhutch]

I used Tygon on mine except for the filter to the fuel pump because of the bend radius. For that I used a section of the original. The plastic bit was used as a mounting point I think and can be pitched in the trash.
Heres a link to buy the Tygon style. The nice thing about this fuel line is that it is extremely flexible and not thick like the crap you would pick up at the auto parts store. Order the 5/16x7/16.

http://www.smallparts.com/products/descriptions/692.cfm

[kip]

not sure if this will help anyone, but... the stock hose varies ID between ends in some cases. Like the fuel pump inlet is smaller than the stock fuel filter. I am with mhutch ... the black connector thing seems worthless to me and just adds another 1/4 to 5/16 and back hassle.

Anyone else have trouble getting their hands around the plumbing? Would it be easier to take of the tire and inner fender?

With the tank, seat and seat cowl off it is not too bad. The fuel pump is mounted by rubber to metal tabs and so can be taken off of the inner fender with no tools if you want. I left it on there and cut off the old hoses.

[LeftRightLeftThrottle]

Playing with the blue stuff I noticed it had a tendency to kink, I haven't installed it yet though.
The stock fuel filter nipples are bigger than 5/16 and the polyurethane won't strectch over it.
The stock hoses actually still look pretty good on mine, they have some kind of grey plastic or different rubber coating on the outside of the black rubber. I was getting a leak at the fuel pump in the cold and I thought the rubber was cracking, now I guess it was just stiff enough for gas to slip by, the spring clamps were weakening aswell.
Due to the bends required for the stock location of the fuel pump I may just relocate it if i decide to use all new fuel line, otherwise I'll put the stock stuff back on with some hose clamps.

[MrDude_1]

Playing with the blue stuff I noticed it had a tendency to kink, I haven't installed it yet though.
The stock fuel filter nipples are bigger than 5/16 and the polyurethane won't strectch over it.
The stock hoses actually still look pretty good on mine, they have some kind of grey plastic or different rubber coating on the outside of the black rubber. I was getting a leak at the fuel pump in the cold and I thought the rubber was cracking, now I guess it was just stiff enough for gas to slip by, the spring clamps were weakening aswell.
Due to the bends required for the stock location of the fuel pump I may just relocate it if i decide to use all new fuel line, otherwise I'll put the stock stuff back on with some hose clamps.

you can stretch the blue hose by putting the end of it in boiling water, then pushing it onto something to expand it.
i did that to make it fit as my rear brake reservoir... lol.