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'94 M900 - Tank Vent Hoses

Started by Howley, February 10, 2012, 04:28:22 AM

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Howley

February 10, 2012, 04:28:22 AM
Hi All,

I have two vents coming out the bottom of the tank on my '94 M900.
I'm guessing one is overflow and one is a vent, so I'm guessing I can splice the overflow into the carb overflow, and leave the vent alone. Is this true?
Am I able to splice these both into a single hose?

Thanks!

Luke

ducpainter

#1
February 10, 2012, 04:30:34 AM
If you have no charcoal canister you van use a Y connector and splice them together.
"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."


Howley

#2
February 10, 2012, 05:06:08 AM
Excellent. And I can splice them into the carb overflow?

battlecry

#3
February 10, 2012, 05:56:56 AM
If you do, it may complicate removing or lifting the tank.

ducatiz

#4
February 10, 2012, 06:17:04 AM
tank overflow is non-pressurized

putting it onto the carb return will pressurize it in the wrong direction.

the vent hose should just hang loose.

I took the charcoal canister off (Howley is in Oz right?  No canister there) and ran both below the bike.

Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

Howley

#5
February 10, 2012, 07:43:32 AM
Which is the vent and which is the overflow?

ducatiz

#6
February 10, 2012, 08:01:43 AM
Quote from: Howley on February 10, 2012, 07:43:32 AM
Which is the vent and which is the overflow?

Usually there is a sticker on the bottom of the tank showing the orientation.  I don't have that bike so i can't tell, but usually the one nearest the rear is the vapor line and the one towards the front is the overflow.
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

ducpainter

#7
February 10, 2012, 05:30:54 PM
Quote from: Howley on February 10, 2012, 07:43:32 AM
Which is the vent and which is the overflow?
Pretty sure the overflow/cap area drain is the one closest to the outside of the tank.
"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."


Nomad

#8
February 10, 2012, 10:00:59 PM
I'm not recommending this, but now I'm curious.  In the process of putting in my FCR's, I for some reason removed both those hoses.  I haven't experienced any ill effects, am I just lucky or is it not a big deal?

Howie

#9
February 10, 2012, 10:05:37 PM
Quote from: Nomad on February 10, 2012, 10:00:59 PM
I'm not recommending this, but now I'm curious.  In the process of putting in my FCR's, I for some reason removed both those hoses.  I haven't experienced any ill effects, am I just lucky or is it not a big deal?

The job of the hoses is to keep fuel from dumping on your engine if you spill while fueling or fuel comes out of the vent hose from expansion.  No overfolw or expansion, no problem, but...

Nomad

#10
February 10, 2012, 10:25:21 PM
Quote from: howie on February 10, 2012, 10:05:37 PM
The job of the hoses is to keep fuel from dumping on your engine if you spill while fueling or fuel comes out of the vent hose from expansion.  No overfolw or expansion, no problem, but...

Gotcha, I'll be careful and not top it off completely... or find some hoses that fit

Howley

#11
February 10, 2012, 11:36:06 PM
Correct howie and ducatiz.. I blew into the outer-most outlet, air came out the overflow drain.

Real Recognize Real

#12
February 14, 2012, 07:23:25 PM
Quote from: Nomad on February 10, 2012, 10:25:21 PM
Gotcha, I'll be careful and not top it off completely... or find some hoses that fit

This is my scenario (FCRs and removed hoses) but I'm going to reinstall the vent and overflow hoses. Btw - what size are these hoses?
Don't argue with idiots. They'll drag you down to their level and beat you with experience.

ducatiz

#13
February 14, 2012, 07:34:38 PM
6mm i think, but you better just check.
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

Howley

#14
February 15, 2012, 12:59:12 AM
Yep 6mm.
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