Routing of carb hoses?

[Tropic-al]

Does anyone have a drawing of the routing of all the hoses to the carbs, manifold, petcocks and air box?
Did a drawing before I took them apart, but misplaced it somewhere.
Thanks.

[DGXSER]

A mental picture...

No drawing for the Standard, but it is not to horribly difficult.

First hose I hook up is the vac advance to the nipple on the engine side of carb no 2. That is the long thinner hose that runs down to the left side engine case cover or timing cover.

Next would be to hook the vent lines to the air box. That is the lines from the two UPPER Ts between the carbs. If you do not have the factory air box and are using independant filters (PODS) then the vent hoses can just be tied to the frame or something to keep them up above the carbs.

Now to the petcocks, you should have three lines to hook to each of the petcocks. One is smaller and it is the vacuum line. It will run from the vac nipple on the petcock to one of the vac ports on the intake boots that are right up by the engine. Typically the left side petcock goes to no 2 boot, and the right to no 3. Then you will have two fuel lines that T together and go to the fuel inlet Ts, just hook them up to the oulets. (Note...I have never actually owned a standard, and logic tells me I could be wrong and there may only be one fuel outlet from the petcocks.) HTH

[Tropic-al]

DGXER.
Sounds pretty simple. Thanks for creating the mental picture.

[Ken Talbot]

Then you will have two fuel lines that T together and go to the fuel inlet Ts, just hook them up to the oulets. (Note...I have never actually owned a standard, and logic tells me I could be wrong and there may only be one fuel outlet from the petcocks.) HTH

Close, but not quite.

DGXSER was right about the upper T between each pair of carbs connecting to the nipples on the airbox, or venting to atmosphere.

However, each petcock on a Standard has only two nipples. The small one connects to a vacuum nipple on one of the manifolds. The larger nipple connects to the lower T between a pair of carbs. Personally, I like to connect the left side petcock to the T between the right pair of carbs, and the right side petcock to the T between the left pair of carbs. This seems to help eliminate the problem of pinched fuel lines and it give you more room to work when taking the tank off or performing a sync.

[DGXSER]

So in this case logic prevails....proof that neither women or the government were involved.

[Tropic-al]

DGXER and Ken.

So in this case logic prevails....proof that neither women or the government were involved.

DGXER:
Logic did prevail !! When I went to look at my tank and carb set up I figured there was a difference between Special and Standard petcocks. Thanks.
Ken:
After I came back in, I read your post. Thanks for further clarifying the difference.
What had me puzzled was a line T'd into each line from the petcocks (about 2in. from the petcocks) to the T's in the carbs. It creates like an H when you imagine it. Apparently to feed all carbs from both petcocks to ensure all gas from both sides of tank is used??? Is this crossover line from factory or had the PO installed it and I replaced it when I have changed hoses??

[natemoen]

Not factory but its something plenty of people add in. It's nice then if your driving down the road and need to switch to reserve you only need to switch one at a time and still feed all 4

[Ken Talbot]

What had me puzzled was a line T'd into each line from the petcocks (about 2in. from the petcocks) to the T's in the carbs. It creates like an H when you imagine it. Apparently to feed all carbs from both petcocks to ensure all gas from both sides of tank is used??? Is this crossover line from factory or had the PO installed it and I replaced it when I have changed hoses??

On a Special, the petcock nipple which flows when in prime position is the one that flows to a T fitting on the main supply hose. This fitting is on the line coming from the octopus to feed the carbs. When there is no vacuum, the octopus prevents any flow, so that line coming in via the T fitting acts as a sort of side door for getting gas to the supply hose and on to the carbs.

When a Special petcock is in On or Reserve, gas frows from another nipple to the octopus, which then lets it pass on to the line going to the carbs. On its way to the carbs, the gas passes by that "side door" but of course nothing is coming in that way any more.

At least, that is the way it should all work on a Special if all the lines are where they are supposed to be. Apparently, that is not always the case!

[CatatonicBug]

Not factory but its something plenty of people add in. It's nice then if your driving down the road and need to switch to reserve you only need to switch one at a time and still feed all 4

Just remember that the tunnel in the tank will always cause a separation in the fuel supply. That is the reason we have 2 petcocks. connecting the lines between the petcocks only allows one side's reserve function to work (and yes, it will feed all 4 carbs for a while), but will not allow the use of the fuel "stuck" on the other side to be used unless you eventually turn on that side's "reserve" too.

[natemoen]

I did say one at a time.

[Tropic-al]

Ken.

At least, that is the way it should all work on a Special if all the lines are where they are supposed to be. Apparently, that is not always the case!

Thanks for the input. Mine is a Standard though.

[Ken Talbot]

Sorry for the confusion, Tropic-al. I meant to cover your specific issue in my first reply, then added the Special info to the hijack section of the thread. Did the first part help you any?

[Tropic-al]

Ken.

Definitely helped.
One other question. Is it possible to swing the lower T's to point upwards?
Is it going to damage some o ring and leaking might start?
I am going by someone's post that showed this and had more room to put filters on.
Thanks.

[petejw]

you can point the 't's up if that helps
you in what you want to achieve,
just be careful, if those 't's havent been moved in a long
time and they feel tight to move, you may run the risk
of them leaking.
if they are tight to turn give them a squirt of pb blaster or the like
and work the 't's up and down gradually,
other than that you should be sweet.