I apologize for resurrecting a 5 or 6 year old question. I studied the historical advise given on removal of the underseat canister and how to route/block off the hoses associated with that. My question (other than how the hell did I get a CA bike in MS) is thus: the ports on the right side on my tank are color coded blue and red. Red being the right (outer) port. When I removed the line from this port, it was pressurized and discharged a small amount (less than an ounce) of fuel. The bike had been exhibiting symptoms of poor/erratic idle and "surging/stumbling below 3K RPM (as described in numerous previous threads). Is that line supposed to be pressurized?

Little history: bike is a 2011 with 1001 miles on the clock (yes, one thousand and one). Plugs all looked good (but I replaced them anyway). Fresh fuel (non E) with a dose of Seafoam. Irregular idle and surging got worse (it seemed) after riding it 50-miles. Top end, pulls like a banshee. Thanks for any advise or links to greater knowledge.

ZeeBeast
South Misipi

run a can of BG44K, (see mix directions - strong stuff) for several tanks

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I would not be concerned about less than ounce of fuel running out of that hose. One of those lines is a return to the fuel tank and the other is probably a pickup for overflows at the filler neck. The breather and overflow nipples on my non-CA tank don't drip much at all when I take the hoses off but some gas gets trapped in the plastic I always wrap around them when the tank is off. Yours is designed to reintroduce fuel vapor and overflow so a small spill seems normal to me. I don't think the presence of fuel in that line or lack thereof is related to your poor engine performance at low rpm.

No doubt you have come across clogged fuel filter threads. That could be it.

* Last updated by: Rook on 5/7/2017 @ 10:10 AM *

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Counter to accepted procedure, I did two things at once, so my results could be attributed to either. New set of sparking plugs AND removed the emissions can. Bike started easily and found a 2000RPM idle point in a few seconds. No sputter or varying tach reading. I manually set idle at 1100RPM and she is purring like a kitten. No WOT operation (still a lot of tupperware to reinstall) but I am encouraged by the improvement. :-)

The emissions can is NOT designed to have raw fuel entering it.It will fail.This could create a problem equalizing the fuel tank(pretty sure on this).At higher rpms,you may get a fuel starvation issue happening(if the cannister is ruined).I think you did okay with your 'mod'.You might check and see if you get any fuel coming out of your emission can now.Before you ride around.I don't think that cannister is actually 'necessary' anyway...it's an emissions deal.HOWEVER...I'm not sure about the fuel path without that in the line.Maybe nothing?IDK.I'm guessing you plugged that line?If so...it's running okay now?

"When I removed the line from this port, it was pressurized and discharged a small amount (less than an ounce) of fuel. The bike had been exhibiting symptoms of poor/erratic idle and "surging/stumbling below 3K RPM (as described in numerous previous threads). Is that line supposed to be pressurized?"...this sounds like a fouled cannister.Maybe Hub will add to this.

"Red being the right (outer) port. When I removed the line from this port".The tank vent SHOULD allow escaping vapors.If the line had pressure,then it's not going through to where it needs to.That goes to the cannister?If so,that can is bad.

* Last updated by: Grn14 on 5/7/2017 @ 1:38 PM *

The emissions can is NOT designed to have raw fuel entering it.It will fail.

...but if the can got vapors in it, the vapors are going to condense into raw gas at some point. I would expect it would need to do that before going back to the fuel tank. It would not make sense to send vapor back to the tank only to get immediately recovered again. If that is a return from the can, any gasoline in there ought to be liquid. If it is an overflow from the filler neck, that was liquid when it spilled over.

"Red being the right (outer) port. When I removed the line from this port".

The tank vent SHOULD allow escaping vapors.If the line had pressure,then it's not going through to where it needs to.That goes to the cannister?If so,that can is bad.

I presume both nipples on the back bottom of the fuel tank are returns. It would not make sense to recover vapor from the bottom of the tank. It does make sense to let water (or gasoline in this case) seek it's own level. Gas floats on water, water runs downhill.

JMHO. I don't have a CA model.

* Last updated by: Rook on 5/8/2017 @ 3:33 AM *

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If there was pressure in that hose and the ounce of fuel squirted out, that was just pressure from vapor. Gas compresses easier than liquid.

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Ever open your gas cap and hear a squirt of vapor? same thing.

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Probably the emissions tightening before it's called for the other 48. The tank is closed loop. Heat on the tank expands inside so red dot pipe is sealed at the recover cartridge. The other is the charcoal filter for vapor. The other pipe is for rain/washing the bike so the water drains below the filer's level. Blue dot is at the gas cap. Find the tiny hole around the rubber gasket that covers it. Red dot is up at the ceiling and hangs there if overfilled, you throttle up or hit the brakes, I forget how it's aimed.

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Either the new sparklers or the emissions surgery did the trick. She runs out well at high RPMs and does not chug at low speed. No gasoline drops either. Thanks for suggestions and wisdom imparted.

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