Main Menu

FUEL HOSE SIZE - 97M900

Started by greenohawk69, January 23, 2017, 08:11:17 AM

Previous topic - Next topic
Print
Go Down Pages1 2
User actions

greenohawk69

January 23, 2017, 08:11:17 AM
What is the size of the fuel hose that is north of the fuel pump?
"An enlightened people, and an energetic public opinion... will control and enchain the aristocratic spirit of the government." --Thomas Jefferson to Chevalier de Ouis, 1814

There are 4 boxes to be used in the defense of liberty:  Soap, Ballot, Jury and Ammo.  Please use in this order.  -- Ed Howdershelt

greenohawk69

#1
January 23, 2017, 08:23:31 AM
Found a different thread:  http://www.ducatimonsterforum.org/index.php?topic=43932.0

That states it is 5/16" to the vacuum petcock (vp) and 1/4" from the vp to the pump.

A member stated they removed the vacuum petcock. What are the pros and cons to this?
"An enlightened people, and an energetic public opinion... will control and enchain the aristocratic spirit of the government." --Thomas Jefferson to Chevalier de Ouis, 1814

There are 4 boxes to be used in the defense of liberty:  Soap, Ballot, Jury and Ammo.  Please use in this order.  -- Ed Howdershelt

Speeddog

#2
January 23, 2017, 08:59:20 AM
Not sure which direction North is on the bike.....

I've found that by this time, the youngest VP on a Monster being 16 years old, many of the vacuum petcocks are not working properly.
Not opening, or not closing, or leaking from the fuel to the vacuum side.

Manual petcock you've got to remember to turn it on and off.
- - - - - Valley Desmo Service - - - - -
Reseda, CA
(951) 640-8908

~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

greenohawk69

#3
January 23, 2017, 09:20:17 AM
The pump is lower or south of the vacuum petcock. I'm referring to the hose from the pump back up towards the petcock and gas tank.
"An enlightened people, and an energetic public opinion... will control and enchain the aristocratic spirit of the government." --Thomas Jefferson to Chevalier de Ouis, 1814

There are 4 boxes to be used in the defense of liberty:  Soap, Ballot, Jury and Ammo.  Please use in this order.  -- Ed Howdershelt

Speeddog

#4
January 23, 2017, 07:15:12 PM
Pump to petcock is 1/4" or thereabouts.

Buuuuuutttt.... it's a preformed hose, it does a very tight bend to connect to the bottom of the fuel pump.
Over-the-counter fuel hose won't make that bend.

You may be able to re-route some regular hose and get it to work.
- - - - - Valley Desmo Service - - - - -
Reseda, CA
(951) 640-8908

~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

ducpainter

#5
January 23, 2017, 07:56:16 PM
Quote from: Speeddog on January 23, 2017, 07:15:12 PM
Pump to petcock is 1/4" or thereabouts.

Buuuuuutttt.... it's a preformed hose, it does a very tight bend to connect to the bottom of the fuel pump.
Over-the-counter fuel hose won't make that bend.

You may be able to re-route some regular hose and get it to work.
Shouldn't we be concentrating on getting rid of a vacuum petcock on a 20 year old bike?

Then a preformed hose is no longer an issue. ;)

"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Speeddog

#6
January 23, 2017, 08:24:48 PM
Well, I've eliminated the VP on my M750, and have a manual petcock spliced into the OEM line that formerly went from the VP to the pump.
- - - - - Valley Desmo Service - - - - -
Reseda, CA
(951) 640-8908

~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

Howie

#7
January 23, 2017, 11:00:44 PM
This is what I did on my 750.  Got rid of the preformed and got the hose to the carbs away from the heat.

greenohawk69

#8
January 25, 2017, 11:40:19 AM
Have some questions as I can't quite make everything out in the picture:

1) Are you running a 5/16" fuel line from the fuel filter straight to the carb (bypassing the vacuum  petcock and the fuel pump)? Any issues doing this? I would be using a shutoff valve between the filter and carb...probably in a location somilar to Howies'.

2) If the fuel pump is bypassed, does anything have to be done to it (other than plugging inlet / outlet)?

3) The vacuum hoses from the VP to the manifold and from one manifold to the other - are these removed? If yes, are the outlets on the manifolds plugged?

"An enlightened people, and an energetic public opinion... will control and enchain the aristocratic spirit of the government." --Thomas Jefferson to Chevalier de Ouis, 1814

There are 4 boxes to be used in the defense of liberty:  Soap, Ballot, Jury and Ammo.  Please use in this order.  -- Ed Howdershelt

ducpainter

#9
January 25, 2017, 11:51:26 AM
If you eliminate the pump you won't ever be able to use all the fuel in the tank. There will always be about 1/3 left due to the height of the tank outlet and the carb inlet. I wouldn't recommend eliminating the pump.

If you remove the VP you remove the vacuum line and you can use a vacuum cap on the nipple, or a threaded plug in the manifold with the nipple removed.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


greenohawk69

#10
January 26, 2017, 09:14:25 AM
Can a 5/16" fuel hose be used from the fuel filter to the pump? Or just stay with the 1/4"? Some have mentioned the 5/16" won't make the bend to the pump. The 1/4" fuel line can make the bend?

In the above link I included, a 5/16" SS flexible hose has been used by one owner.

Also, where do individuals install their shutoff valve? I was installing mine after the petcock and prior to the pump.
"An enlightened people, and an energetic public opinion... will control and enchain the aristocratic spirit of the government." --Thomas Jefferson to Chevalier de Ouis, 1814

There are 4 boxes to be used in the defense of liberty:  Soap, Ballot, Jury and Ammo.  Please use in this order.  -- Ed Howdershelt

ducpainter

#11
January 26, 2017, 03:06:41 PM
You should remove the vacuum petcock and install a manual shutoff between the filter and pump where you can reach it.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


koko64

#12
January 26, 2017, 07:01:03 PM
Listen to the man. ;) That vacuum tap will sooner or later let you down. Also, the occasional carb flooding symptom can be dealt with by a quick 20 second off then back on of an easy to reach manual tap with the motor running in most cases. It also helps with servicing, tank draining, etc. Handy to have.
2015 Scrambler 800

Speeddog

#13
January 26, 2017, 07:22:29 PM
This is where I put mine on my M750.
A small piece of adhesive-backed foam rubber from a Shorai battery kit, and a ziptie to keep it roughly in place.
Rerouted the OEM hose from the fuel pump up to it, I'm pretty sure I used the remainder of the OEM hose to continue up to the filter.
Functions as a not-so-quick disconnect for the tank, as well.

- - - - - Valley Desmo Service - - - - -
Reseda, CA
(951) 640-8908

~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

greenohawk69

#14
January 26, 2017, 07:49:13 PM
I've already installed a quick disconnect from the tank to the filter.

I get removing the petcock, thanks.

Was going to install shutoff valve before the pump, but...I bought a 5/16" and it appears that I need a 1/4".

My question is - does the fuel line to the pump need to be 1/4" or can you also use 5/16"?

The flexible 5/16" SS fuel line with magna clamps from Jegs was used by another individual (from the link to another thread).

"An enlightened people, and an energetic public opinion... will control and enchain the aristocratic spirit of the government." --Thomas Jefferson to Chevalier de Ouis, 1814

There are 4 boxes to be used in the defense of liberty:  Soap, Ballot, Jury and Ammo.  Please use in this order.  -- Ed Howdershelt
Print
Go Up Pages1 2
User actions